Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
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): 25.0.2
Operating system and version (eg, Ubuntu 20.04): Ubuntu Server 20.04
Apache or nginx version (eg, Apache 2.4.25): 2.4.54
PHP version (eg, 7.4): 8.1 (same happened with 7.4)
The issue you are facing:
My NextCloud installation sometimes doesn’t show files or apps in general.
I can’t figure out when / why it happens, but it happens, seemingly randomly.
I can replicate it when accessing my NextCloud from outside, but it’s not an issue with my Reverse Proxy or Apache configuration, because sometimes it does work.
Is this the first time you’ve seen this error? (Y/N): yes
Steps to replicate it:
- Open NextCloud from any device
- hope that it works
- sometimes it doesn’t
The output of your Nextcloud log in Admin > Logging:
Too big for GitHub Gist or for pasting here: (https://gofile.io/d/dbGOR7)
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
(https://gist.github.com/Nordikk/011d4f7a397e9615dc6274316ed8c2a2)
The output of your Apache/nginx/system log in /var/log/____:
(https://gist.github.com/Nordikk/8463f2f7d7bbef491a85fb5ec3157752)