https://bugs.winehq.org/show_bug.cgi?id=51869
--- Comment #1 from Alexander Bich quyse0@gmail.com --- Created attachment 70785 --> https://bugs.winehq.org/attachment.cgi?id=70785 simple patch
Attached simple patch. It's not great i.e. performs RtlDosPathNameToNtPathName_U conversion twice, but it fixed the issue for me.