MySQL - Connection Error: No such file or directory

[Keyfolk]

I'm sure the cause of the problem is within KeyHelp
(e.g. Yes


Server operating system + version
Debian 12


Server virtualization technology used
KVM


KeyHelp version + build number
im not sure


Problem description / error messages

Please help me. Suddenly, my websites are no longer accessible.

The error displayed is:

**Service Unavailable**

> The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

When I try to log in to the KeyHelp admin dashboard, I get the following error:

**MySQL - Connection Error: No such file or directory**

How can I fix this?

Here is the output of the MariaDB service log:

```bash
~# journalctl -xeu mariadb.service --no-pager | tail -n 30

Aug 08 05:57:00 hela.xpanel.my.id mariadbd[955]: 2026-08-08 05:57:00 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [Note] Plugin 'FEEDBACK' is disabled.

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [ERROR] /usr/sbin/mariadbd: unknown variable 'provider_bzip2=force_plus_permanent'

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [ERROR] /usr/sbin/mariadbd: unknown variable 'provider_lz4=force_plus_permanent'

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [ERROR] /usr/sbin/mariadbd: unknown variable 'provider_lzma=force_plus_permanent'

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [ERROR] /usr/sbin/mariadbd: unknown variable 'provider_lzo=force_plus_permanent'

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [ERROR] /usr/sbin/mariadbd: unknown variable 'provider_snappy=force_plus_permanent'

Aug 08 05:57:00 hela.myserver.com mariadbd[955]: 2026-08-08 05:57:00 0 [ERROR] Aborting

Aug 08 05:57:01 hela.myserver.com systemd[1]: mariadb.service: Main process exited, code=exited, status=7/NOTRUNNING

Subject: Unit process exited

An ExecStart= process belonging to unit mariadb.service has exited.

The process exited with status code 7.

Aug 08 05:57:01 hela.myserver.com systemd[1]: mariadb.service: Failed with result 'exit-code'.

Subject: Unit failed

The unit mariadb.service has entered the 'failed' state with result 'exit-code'.

Aug 08 05:57:01 hela.myserver.com systemd[1]: Failed to start mariadb.service - MariaDB 10.11.14 database server.

Subject: A start job for unit mariadb.service has failed.

The job identifier is 103 and the job result is failed.
```


Expected result


Actual result


Steps to reproduce


Additional information
(e.g. recent changes to the server, excerpts from log files (/var/log/*, /var/log/keyhelp/php-error.log, etc.))


.

[24unix]

apt update
apt upgrade

I had the same issue today on a customers server.