Login Issues from many users vB 3.8.4
 

Running vB 3.8.4

I have a forum 1.5 million posts and 53,000 users. We were one of those forums that had a dreaded "Kontera Issue" a few months ago. Kontera owned the issue and acknowledged it. Once Kontera fixed it the issue, we were fine.

Recentlly, we've been having some more login issues. Now, of course, I contacted Kontera right away to ask them but they told me they didn't know of any further issues at the moment.

We have made no changed to any files or DB stuff in over a year, what could go suddenly so wrong with user login issues? Can I get some help here?

Thanks in advance