Hi,

Without any manipulation on our part, our forum has crashed and I am stuck on an error 500.

I can't connect to the admin console either.

We have not installed anything on it except the FR language pack. 

Can you tell me what I should do?

 

Maybe your hoster changed something, perhaps php version?

Maybe this can be helpful:

 

Looking at the error message on the ACP screen there, you are either not using PHP 8, or there is something on your site which is not PHP 8 compatible (3rd party).