I'm getting the error | Configuration file /etc/ssh/sshd_config appears to have been manually modified

What type of hardware are you using: VPS bought online
What YunoHost version are you running: 12.1.14
How are you able to access your server: SSH

Describe your issue

This is probably OK if you know what you’re doing! YunoHost will stop updating this file automatically… But beware that YunoHost upgrades could contain important recommended changes. If you want to, you can inspect the differences with yunohost tools regen-conf ssh --dry-run --with-diff and force the reset to the recommended configuration with yunohost tools regen-conf ssh --force

Share relevant logs or error messages

Configuration file /etc/ssh/sshd_config appears to have been manually modified.

This is probably OK if you know what you’re doing! YunoHost will stop updating this file automatically… But beware that YunoHost upgrades could contain important recommended changes. If you want to, you can inspect the differences with yunohost tools regen-conf ssh --dry-run --with-diff and force the reset to the recommended configuration with yunohost tools regen-conf ssh --force.

The SSH configuration appears to have been manually modified, and is insecure because it contains no ‘AllowGroups’ or ‘AllowUsers’ directive to limit access to authorized users.

Weeeeeeell, supposedly you copypasted the answer to your own question … :

If you want to, you can inspect the differences with yunohost tools regen-conf ssh --dry-run --with-diff and force the reset to the recommended configuration with yunohost tools regen-conf ssh --force

i wonder how I can do this process

ssh to your server, then run sudo yunohost tools regen-conf ssh --dry-run --with-diff this will show you what have been changed in the config file. And sudo yunohost tools regen-conf ssh --force to reset it.

Not sure how this happened. Did you change it? Is there another admin on the server?

The groups and permissions page is blank, what can I do?