UBB.threads PHP Forum Software Community Forums Thread Like Summary - Cannot redeclare class Admin

I have a problem with the forum that I have been maintaining for 1 week. Since an hour I get the following message when I want to log in to the admin section: Fatal error: Cannot redeclare class Admin in /home/solexforum/public_html/libs/admin.inc.php on line 54

Is there anyone who can help me fix this problem?

Then one of your languages is probably still corrupted.
Even though you do not display it as a option to select now