Can't login due to the brute force not letting me in but not blocking me

Nextcloud version (eg, 20.0.5): 23.0.0.10
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): nginx version: nginx/1.18.0 (Ubuntu)
PHP version (eg, 7.4): PHP 8.0.14 (cli) (built: Dec 20 2021 21:22:57) ( NTS )

The issue you are facing:
Evey time I try and login it won’t allow me due to a Internal Server error
it says something about brute force, but there is nothing in the Brutefoce DB table
Is this the first time you’ve seen this error? (Y/N):
Y
Steps to replicate it:

  1. Don’t know

The output of your Nextcloud log in Admin > Logging:

  Error    index              Exception: unpack(): Argument #2 ($string) must be of type string, null given in file                                                              2021-12-23T17:17:52+00:00 
                              '/home/cloud/public_html/lib/private/Security/Normalizer/IpAddress.php' line 89 at lib/private/AppFramework/Http/Dispatcher.php line 158                                     
                                                                                                                                                                                                           
                              0. lib/private/AppFramework/App.php line 157                                                                                                                                 
                                 OC\AppFramework\Http\Dispatcher->dispatch(                                                                                                                                
                                                                                                                                                                                                           
                                 )                                                                                                                                                                         
                              1. lib/private/Route/Router.php line 302                                                                                                                                     
                                 OC\AppFramework\App::main(                                                                                                                                                
                                                                                                                                                                                                           
                                 )                                                                                                                                                                         
                              2. lib/base.php line 1006                                                                                                                                                    
                                 OC\Route\Router->match(                                                                                                                                                   
                                                                                                                                                                                                           
                                 )                                                                                                                                                                         
                              3. index.php line 36                                                                                                                                                         
                                 OC::handleRequest(                                                                                                                                                        
                                                                                                                                                                                                           
                                 )                                                                                                                                                                         
                                                                                                                                                                                                           
                              Caused by TypeError: unpack(): Argument #2 ($string) must be of type string, null given at lib/private/Security/Normalizer/IpAddress.php line 89                             
                                                                                                                                                                                                           
                               0. lib/private/Security/Normalizer/IpAddress.php line 89                                                                                                                    
                                  unpack(                                                                                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               1. lib/private/Security/Normalizer/IpAddress.php line 150                                                                                                                   
                                  OC\Security\Normalizer\IpAddress->getIPv6Subnet(                                                                                                                         
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               2. lib/private/Security/Bruteforce/Throttler.php line 305                                                                                                                   
                                  OC\Security\Normalizer\IpAddress->getSubnet(                                                                                                                             
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               3. lib/base.php line 809                                                                                                                                                    
                                  OC\Security\Bruteforce\Throttler->resetDelay(                                                                                                                            
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               4. <<closure>>                                                                                                                                                              
                                  OC::{closure}("*** sensitive parameters replaced ***")                                                                                                                   
                               5. lib/private/Hooks/EmitterTrait.php line 106                                                                                                                              
                                  call_user_func_array(                                                                                                                                                    
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               6. lib/private/Hooks/PublicEmitter.php line 40                                                                                                                              
                                  OC\Hooks\BasicEmitter->emit(                                                                                                                                             
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               7. lib/private/User/Session.php line 411                                                                                                                                    
                                  OC\Hooks\PublicEmitter->emit(                                                                                                                                            
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                               8. lib/private/Authentication/Login/CompleteLoginCommand.php line 44                                                                                                        
                                  OC\User\Session->completeLogin("*** sensitive parameters replaced ***")                                                                                                  
                               9. lib/private/Authentication/Login/ALoginCommand.php line 40                                                                                                               
                                  OC\Authentication\Login\CompleteLoginCommand->process(                                                                                                                   
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              10. lib/private/Authentication/Login/LoggedInCheckCommand.php line 60                                                                                                        
                                  OC\Authentication\Login\ALoginCommand->processNextOrFinishSuccessfully(                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              11. lib/private/Authentication/Login/ALoginCommand.php line 40                                                                                                               
                                  OC\Authentication\Login\LoggedInCheckCommand->process(                                                                                                                   
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              12. lib/private/Authentication/Login/EmailLoginCommand.php line 58                                                                                                           
                                  OC\Authentication\Login\ALoginCommand->processNextOrFinishSuccessfully(                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              13. lib/private/Authentication/Login/ALoginCommand.php line 40                                                                                                               
                                  OC\Authentication\Login\EmailLoginCommand->process(                                                                                                                      
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              14. lib/private/Authentication/Login/UidLoginCommand.php line 54                                                                                                             
                                  OC\Authentication\Login\ALoginCommand->processNextOrFinishSuccessfully(                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              15. lib/private/Authentication/Login/ALoginCommand.php line 40                                                                                                               
                                  OC\Authentication\Login\UidLoginCommand->process(                                                                                                                        
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              16. .../private/Authentication/Login/UserDisabledCheckCommand.php line 58                                                                                                    
                                  OC\Authentication\Login\ALoginCommand->processNextOrFinishSuccessfully(                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              17. lib/private/Authentication/Login/ALoginCommand.php line 40                                                                                                               
                                  OC\Authentication\Login\UserDisabledCheckCommand->process(                                                                                                               
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              18. lib/private/Authentication/Login/PreLoginHookCommand.php line 53                                                                                                         
                                  OC\Authentication\Login\ALoginCommand->processNextOrFinishSuccessfully(                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              19. lib/private/Authentication/Login/Chain.php line 108                                                                                                                      
                                  OC\Authentication\Login\PreLoginHookCommand->process(                                                                                                                    
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              20. core/Controller/LoginController.php line 329                                                                                                                             
                                  OC\Authentication\Login\Chain->process(                                                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              21. lib/private/AppFramework/Http/Dispatcher.php line 217                                                                                                                    
                                  OC\Core\Controller\LoginController->tryLogin("*** sensitive parameters replaced ***")                                                                                    
                              22. lib/private/AppFramework/Http/Dispatcher.php line 126                                                                                                                    
                                  OC\AppFramework\Http\Dispatcher->executeController(                                                                                                                      
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              23. lib/private/AppFramework/App.php line 157                                                                                                                                
                                  OC\AppFramework\Http\Dispatcher->dispatch(                                                                                                                               
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              24. lib/private/Route/Router.php line 302                                                                                                                                    
                                  OC\AppFramework\App::main(                                                                                                                                               
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              25. lib/base.php line 1006                                                                                                                                                   
                                  OC\Route\Router->match(                                                                                                                                                  
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        
                              26. index.php line 36                                                                                                                                                        
                                  OC::handleRequest(                                                                                                                                                       
                                                                                                                                                                                                           
                                  )                                                                                                                                                                        

 
 

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'instanceid' => '**',
  'passwordsalt' => '**',
  'secret' => '**',
  'trusted_domains' => 
  array (
    0 => '***',
  ),
  'datadirectory' => '**',
  'dbtype' => 'mysql',
  'version' => '23.0.0.10',
  'overwrite.cli.url' => ***',
  'dbname' => '***',
  'dbhost' => 'localhost',
  'htaccess.RewriteBase' => '/',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => '***',
  'dbpassword' => '***',
  'installed' => true,
  'app_install_overwrite' => 
  array (
    0 => 'documentserver_community',
    1 => 'timetracker',
  ),
  'maintenance' => false,
);

The output of your Apache/nginx/system log in /var/log/____:

Nothing