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, 20.0.9snap2): 20.0.9snap2
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04 server
Apache or nginx version (eg, Apache 2.4.25): 2.4.41
PHP version (eg, 7.4): 7.4.3
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N):
Steps to replicate it:
- Yes
revert restores working capacity
The output of your Nextcloud log in Admin > Logging:
sudo snap logs nextcloud
2021-05-18T12:12:39Z systemd[1]: Stopped Service for snap application nextcloud.mysql.
2021-05-18T12:12:39Z systemd[1]: Started Service for snap application nextcloud.mysql.
2021-05-18T12:12:39Z nextcloud.mysql[83207]: Starting MySQL
2021-05-18T12:12:41Z nextcloud.mysql[83207]: .. * The server quit without updating PID file (/tmp/pids/mysql.pid).
2021-05-18T12:12:41Z systemd[1]: snap.nextcloud.mysql.service: Main process exited, code=exited, status=1/FAILURE
2021-05-18T12:12:41Z systemd[1]: snap.nextcloud.mysql.service: Failed with result 'exit-code'.
2021-05-18T12:12:41Z systemd[1]: snap.nextcloud.mysql.service: Scheduled restart job, restart counter is at 94.
2021-05-18T12:12:41Z systemd[1]: Stopped Service for snap application nextcloud.mysql.
2021-05-18T12:12:41Z systemd[1]: Started Service for snap application nextcloud.mysql.
2021-05-18T12:12:41Z nextcloud.mysql[83523]: Starting MySQL
Apache LOG
[Tue May 18 11:59:12.032536 2021] [unixd:alert] [pid 16276:tid 140706902656896] AH02155: getpwuid: couldn't determine user name from uid 4294967295, you probably need to m
odify the User directive
[Tue May 18 11:59:12.032693 2021] [unixd:alert] [pid 16278:tid 140706902656896] AH02155: getpwuid: couldn't determine user name from uid 4294967295, you probably need to m
odify the User directive
[Tue May 18 11:59:12.032746 2021] [unixd:alert] [pid 16277:tid 140706902656896] AH02155: getpwuid: couldn't determine user name from uid 4294967295, you probably need to m
odify the User directive
[Tue May 18 12:00:56.135876 2021] [unixd:alert] [pid 16691:tid 140706902656896] AH02155: getpwuid: couldn't determine user name from uid 4294967295, you probably need to m
odify the User directive
[Tue May 18 14:13:54.678677 2021] [mpm_event:notice] [pid 16274:tid 140706902656896] AH00491: caught SIGTERM, shutting down