So it Looks like it is an issue of Simply Knowck with that inofficial dll.
Not the unofficial .DLL file provided. If you go into that mod's original setup, there is a copy of the papyrus .dll file in there for some reason. If that copy is loaded after the updated Papyrus Utilities, then it is, in essence, loading an old copy. The unofficial SK file works fine - you just need to ensure that SK's original file structure does not overwrite Papyrus Utilities - this is why Sheson noted that mod authors shouldn't include it in their mod file structures.