UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support Help - Fatal error: Call to a member function error() on a non-object mysql.inc.php on line 77

Sudden as in overnight error popping. I've made no recent changes board has run without issue for several years.
Stock script...no mods to any UBB master files...Nothing weird on site...
No changes to SQL credentials either...so I'm lost.

Here is the error:

Fatal error: Call to a member function error() on a non-object in /home/XX/XX/XXXXXXX/web/forums/libs/mysql.inc.php on line 77

UBB = Version 7.5.6

I can FTP in but I can't access board or admin panel.

Looking for guidance...pretty please.

Thank you.