Can't login via trusted domain - page refreshes

Nextcloud version (eg, 10.0.2): 11.0
Operating system and version (eg, Ubuntu 16.04): FreeNAS (docker)
Apache or nginx version (eg, Apache 2.4.25): nginx 1.10.3
PHP version (eg, 5.6): 7.1.3
Is this the first time you’ve seen this error?: Yes

Can you reliably replicate it? (If so, please outline steps):

  1. Add a trusted domain
  2. Attempt to log in via newly created trusted domain.
  3. Page refreshes, shows no errors, and user not logged in.

The issue you are facing:

I added a trusted domain, but when I attempt to log in using the new domain, the page simply refreshes and provides no error messages/warnings. I can log in through the docker’s local IP just fine.

The output of your Nextcloud log in Admin > Logging:

Trusted domain error. "123.123.123.0" tried to access using "trusteddomain.com" as host.

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

?php                                                                                                                                                                                           
$CONFIG = array (                                                                                                                                                                               
  'datadirectory' => '/data',                                                                                                                                                                   
  'apps_paths' =>                                                                                                                                                                               
  array (                                                                                                                                                                                       
    0 =>                                                                                                                                                                                        
    array (                                                                                                                                                                                     
      'path' => '/nextcloud/apps',                                                                                                                                                              
      'url' => '/apps',                                                                                                                                                                         
      'writable' => false,                                                                                                                                                                      
    ),                                                                                                                                                                                          
    1 =>                                                                                                                                                                                        
    array (                                                                                                                                                                                     
      'path' => '/apps2',                                                                                                                                                                       
      'url' => '/apps2',                                                                                                                                                                        
      'writable' => true,                                                                                                                                                                       
    ),                                                                                                                                                                                          
  ),                                                                                                                                                                                            
  'memcache.local' => '\\OC\\Memcache\\APCu',                                                                                                                                                   
  'instanceid' => 'ocadc83b19e7',                                                                                                                                                               
  'mail_from_address' => 'administrator',                                                                                                                                                       
  'logtimezone' => 'UTC',                                                                                                                                                                       
  'logdateformat' => 'Y-m-d H:i:s',                                                                                                                                                             
  'passwordsalt' => 'redacted',                                                                                                                                           
  'secret' => 'redacted',                                                                                                                               
  'trusted_domains' =>                                                                                                                                                                          
  array (                                                                                                                                                                                       
    0 => 'freenas.local:8888',                                                                                                                                                                  
    2 => 'trusteddomain.com:8888',                                                                                                                                                             
    2 => '10.10.10.10:8888',                                                                                                                                                                                                                                                                                                                                     
  ),                                                                                                                                                                                            
  'overwrite.cli.url' => 'http://freenas.local:8888',                                                                                                                                           
  'dbtype' => 'sqlite3',                                                                                                                                                                        
  'version' => '11.0.2.7',                                                                                                                                                                      
  'installed' => true,                

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

/var/log/nginx/error.log was empty


Anyone out there?