NastyBoy wrote: ↑Tue Jan 22, 2019 9:45 am
I have managed to set the MChat in German. But unfortunately even after the empty of the cache in the FTP, he still shows me the error. Since I can not log into the admin panel at all. The problem is that I can not delete the wrong file that is still stored in the cache in the admin panel.
You should be able to completely uninstall the extension with phpMyAdmin. Look for any tables uniquely related to the mchat and delete those tables, look for fields in other tables related to mchat and delete those (most probably only in the config_table). In the extensions table, delete the record for mchat. (Caveat: if mchat keeps records of the chats in a table, backup that table so that you can restore it after fixing the problem).
in /cache delete everything except for .htaccess and index.htm.
Disclaimer: I don't know mchat so I perhaps there's something I am not aware of, but up to now, I've always been able to remove all extensions.
Just make sure to take a backup before manually editing your database (that way there's no risk).
Added: Although my (hack) method has always worked for me, it is NOT a method endorsed by phpBB. You should try every legit-method first (read
Disabling all extensions at once (by david63)