Hi Peter
the logs show that an unhandled exception occured and direct you to a dated diagnostic text file by full name and path but the file does not exist, maybe because of this:
Exception occur in the UnhandledExceptionFilter # # TID=6228 UnHandledExceptionHandler.cpp 203
Before the original exception there are a few "Invalid input parameter" errors.
I can not reproduce this error in any other instance of B1 9.1 PL06 that I have access to, not even on the copy of the company that fails when it was upgraded from 8.82 back in 2015-08-28.
Regards,
Denes