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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 27.0.2
Operating system and version _Ubuntu 22.04
Apache or nginx version (eg, Apache 2.4.25): 2.4.52-1ubuntu4.6
PHP version (eg, 7.4): PHP 8.1.2-1ubuntu2.13
The issue you are facing:
When in Nextcloud Office an image is displayed of a file box and the message “Reconnecting”. Also around this time the system becomes unusable, pages won’t load or a extremely slow in loading.
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
It seems pretty random but can sometimes trigger it by doing an @mention in the chat while working on a file in Nextcloud Office.
The output of your Nextcloud log in Admin > Logging:
[core] Error: TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 at <<closure>>
0. /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php line 121
OC\User\User->__construct()
1. /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php line 96
OCA\Collectives\Versions\CollectiveVersionsExpireManager->expireFolder()
2. /var/www/html/apps/collectives/lib/BackgroundJob/ExpirePageVersions.php line 35
OCA\Collectives\Versions\CollectiveVersionsExpireManager->expireAll()
3. /var/www/html/lib/public/BackgroundJob/Job.php line 81
OCA\Collectives\BackgroundJob\ExpirePageVersions->run()
4. /var/www/html/lib/public/BackgroundJob/TimedJob.php line 103
OCP\BackgroundJob\Job->start()
5. /var/www/html/lib/public/BackgroundJob/TimedJob.php line 93
OCP\BackgroundJob\TimedJob->start()
6. /var/www/html/cron.php line 152
OCP\BackgroundJob\TimedJob->execute()
at 2023-08-22T13:40:01+00:00
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
$CONFIG = array (
'instanceid' => #######,
'passwordsalt' => ########,
'secret' => ########,
'trusted_domains' =>
array (
0 => #######,
),
'datadirectory' => '/data/ncdata',
'dbtype' => 'pgsql',
'version' => '27.0.2.1',
'overwrite.cli.url' => ########,
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => #######,
'dbpassword' => #######,
'installed' => true,
'filelocking.enabled' => true,
'memcache.locking' => '\\OC\\Memcache\\Redis',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.local' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'localhost',
'port' => 6379,
),
'skeletondirectory' => '',
'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
'default_phone_region' => 'US',
'mail_from_address' => #####,
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => ######,
'mail_smtphost' => ############,
'mail_smtpport' => '25',
'mail_smtpauth' => 1,
'mail_smtpname' => #######,
'mail_smtppassword' => #######,
);
The output of your Apache/nginx/system log in /var/log/____:
[Tue Aug 22 00:00:01.890352 2023] [mpm_event:notice] [pid 999:tid 139954192504704] AH00489: Apache/2.4.52 (Ubuntu) OpenSSL/3.0.2 configured -- resuming normal operations
[Tue Aug 22 00:00:01.890906 2023] [core:notice] [pid 999:tid 139954192504704] AH00094: Command line: '/usr/sbin/apache2'
[Tue Aug 22 13:54:12.708740 2023] [mpm_event:notice] [pid 999:tid 139954192504704] AH00492: caught SIGWINCH, shutting down gracefully
[Tue Aug 22 13:54:16.068041 2023] [core:warn] [pid 999:tid 139954192504704] AH00045: child process 7089 still did not exit, sending a SIGTERM
[Tue Aug 22 13:54:16.068114 2023] [core:warn] [pid 999:tid 139954192504704] AH00045: child process 7146 still did not exit, sending a SIGTERM
[Tue Aug 22 13:54:17.711025 2023] [http2:warn] [pid 7146:tid 139954192504704] AH10291: h2_workers: cleanup, 7 idle workers did not exit after 5 seconds.
[Tue Aug 22 13:54:17.714272 2023] [http2:warn] [pid 7089:tid 139954192504704] AH10291: h2_workers: cleanup, 9 idle workers did not exit after 5 seconds.
[Tue Aug 22 13:54:18.133225 2023] [mpm_event:notice] [pid 19474:tid 140441052624768] AH00489: Apache/2.4.52 (Ubuntu) OpenSSL/3.0.2 configured -- resuming normal operations
[Tue Aug 22 13:54:18.133322 2023] [core:notice] [pid 19474:tid 140441052624768] AH00094: Command line: '/usr/sbin/apache2'
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T09:40:01-0400 | |
|---|---|---|---|---|
| Error | no app in context | OCA\DAV\Connector\Sabre\Exception\FileLocked: “Documents/IT Spending Database/IT Spending.accdb” is locked, existing lock on file: 2 shared locks | 2023-08-22T09:10:39-0400 | |
| Error | no app in context | OCA\DAV\Connector\Sabre\Exception\FileLocked: “Documents/IT Spending Database/IT Spending.accdb” is locked, existing lock on file: 2 shared locks | 2023-08-22T09:10:03-0400 | |
| Error | no app in context | OCA\DAV\Connector\Sabre\Exception\FileLocked: “Documents/IT Spending Database/IT Spending.accdb” is locked, existing lock on file: 2 shared locks | 2023-08-22T09:10:01-0400 | |
| Error | no app in context | OCA\DAV\Connector\Sabre\Exception\FileLocked: “Documents/IT Spending Database/IT Spending.accdb” is locked, existing lock on file: 2 shared locks | 2023-08-22T09:09:58-0400 | |
| Error | no app in context | OCA\DAV\Connector\Sabre\Exception\FileLocked: “Documents/IT Spending Database/IT Spending.accdb” is locked, existing lock on file: 2 shared locks | 2023-08-22T09:09:55-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T08:35:01-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T07:30:02-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T06:30:01-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T05:25:02-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T04:25:01-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 | 2023-08-22T03:20:02-0400 | |
| Error | core | TypeError: OC\User\User::__construct(): Argument #3 ($dispatcher) must be of type Symfony\Component\EventDispatcher\EventDispatcherInterface, OC\EventDispatcher\EventDispatcher given, called in /var/www/html/apps/collectives/lib/Versions/CollectiveVersionsExpireManager.php on line 121 |