@DougHiggs just a few thoughts; all assuming on prem CRM.
1.) Have you tried removing the plug-in for a 'trial run' on some sessions to see if in fact the Plug-In is the root cause? They wouldn't be able to file for a while during the test of course.
2.) With the Plug In being local, I don't believe there should be any conflict with the GoDaddy (not certain, just seems off to me)
3.) On a TS with the OL Plug In each user has to have this installed while an admin, typically temporary only for install but another item I've run into..
4.) Lastly 'for fun', I'd see how the OL plug-in worked on a local install if possible. Just to rule out the GoDaddy stuff as well.
Good luck