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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): 28.0.4
Operating system and version (eg, Ubuntu 20.04): Unraid docker linuxserver
Apache or nginx version (eg, Apache 2.4.25): Unraid docker linuxserver
PHP version (eg, 7.4): Unraid docker linuxserver
The issue you are facing:
I recently lost some data out of my array and had an error which asked me to create a .ocdata file in my main Nextcloud directory. I did that and Nextcloud loaded and runs properly, but a few hours later I thought to dig into all my menus and, when I click my Admin account’s + Apps link in the dropdown I get the following error:
Internal Server Error
The server was unable to complete your request.
If this happens again, please send the technical details below to the server administrator.
More details can be found in the server log.
Technical details
- Remote Address: 172.18.122.215
- Request ID: XbS9VPk4XMyU9XrhyfOk
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Try clicking + Apps as admin
The output of your Nextcloud log in Admin > Logging:
[PHP] Error: file_get_contents(/data/nextcloudadmin/files/Documents/Readme.md): Failed to open stream: No such file or directory at /app/www/public/lib/private/Files/Storage/Local.php#331
PROPFIND /remote.php/dav/files/nextcloudadmin/
from 172.18.122.215 by nextcloudadmin at 15 Apr 2024, 01:11:18
{"reqId":"Ch7CanofuCqQlRGAHvkB","level":3,"time":"2024-04-14T23:11:18+00:00","remoteAddr":"172.18.122.215","user":"nextcloudadmin","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/nextcloudadmin/","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36","version":"28.0.4.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/config/www/nextcloud/apps/text/lib/DAV/WorkspacePlugin.php","line":119,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/PropFind.php","line":95,"function":"OCA\\Text\\DAV\\{closure}","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/config/www/nextcloud/apps/text/lib/DAV/WorkspacePlugin.php","line":117,"function":"handle","class":"Sabre\\DAV\\PropFind","type":"->"},{"file":"/app/www/public/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"propFind","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":1052,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":984,"function":"getPropertiesByNode","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":1662,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":1647,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":346,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Server.php","line":373,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/app/www/public/remote.php","line":172,"args":["/config/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/app/www/public/lib/private/Files/Node/File.php","Line":56,"message":"","exception":[],"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"},"id":"661c62a2d43d0"}
The output of your config.php file in `/path/to/nextcloud` (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'memcache.local' => '\\OC\\Memcache\\APCu',
'redis' =>
'timeout' => 1.5,
),
'datadirectory' => '/data',
'instanceid' => '
'trusted_domains' =>
array (
'dbtype' => 'pgsql',
'version' => '28.0.4.1',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' =>
'installed' => true,
'app_install_overwrite' =>
array (
0 => 'twofactor_rcdevsopenotp',
1 => 'twofactor_admin',
2 => 'epubreader',
),
'twofactor_enforced' => 'true',
'twofactor_enforced_groups' =>
array (
0 => 'admin',
),
'twofactor_enforced_excluded_groups' =>
array (
),
'mail_from_address' => 'nextcloud',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_smtpsecure' => 'ssl',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
'filelocking.enabled' => 'true',
'upgrade.disable-web' => true,
);
The output of your Apache/nginx/system log in `/var/log/____`:
PASTE HERE
PASTE HERE
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.
PASTE HERE