I wonder if the part of the error listing that is shown below could be the culprit. Never had that with the Reports Families & Individuals list errors.
No, I don’t think so. I believe that is a completely separate issue, and not related to MySQL. Unfortunately it is the RESULT of an error, not the cause. It is a very generic error message, similar to an “error 500” type that actually tells you almost nothing about the cause. I have seen a number of these on my own site since the upgrade and am working to find the cause.