What a nightmare! Or it would be if I have slept last night.
Spent all night fixing crashes with the Nov release and desperately looking for the Oct release file.
And my server is unable to send emails, so no detailed report to their team. Very frustrating.
Did some further research. Was caused by existing appended queries in my case. After removing them from the model and recreating them, the problem was gone. Make sure table and column names are the same afterwards, so reports keep working without changes.
Hope this can be of any help. But the problem remains, an update may never cause this.