https://bugs.winehq.org/show_bug.cgi?id=50557
--- Comment #7 from Joe Davison joe@warhaggis.com --- The program is freely available however I'm not sure how useful testing it would be without the actual game.
I am working on this with a more knowledgeable buddy and we have identified the specific line *attr |= FILE_ATTRIBUTE_REPARSE_POINT; as causing the issue. Building with this commented out has USVFS working just fine.
We have implemented a WARN around this and yeah you seem to be on the money... I have attached the full log with this warning (grep for 'mountpoint').