I think that the regex is missing a pair of quotations. I think that the blacklist lines should look like:
blacklist1 = EventCode="4662" Message="Object Type:\s+(?!groupPolicyContainer)"
blacklist2 = EventCode="566" Message="Object Type:\s+(?!groupPolicyContainer)"
That would explain the error message with the 4 being picked up as a delimeter instead.
... View more