Menu errors

After upgrading my J3.9.2 site to php7.2 I'm now having issues with Joomla's main menu, with many of the links to CB Userlists resulting in "Call to undefined function mysql_field_type()".

I've rebuilt all of the menu items, however, the issue remains. Removing the trailing "&Itemid=172" (or whatever Itemid number is in the address bar) will make the page resolve, but without the side modules.

I realize this could be caused by any number of things, and I hope that I've given enough explanation of the issue. Because it is only happening with links to CB lists, I thought I should start here.

Have you any ideas as to how I can correct these issues?

Thank you in advance!

Sounds like it's probably a module you have assigned to that menu item. Within Extensions > Modules unpublish any module you've assigned to that menu item and see if issue persists.