https://bugs.winehq.org/show_bug.cgi?id=42874
--- Comment #11 from Olivier F. R. Dierick o.dierick@piezo-forte.be --- I also did a quick check of the WNetGetUniversalNameW() function, and though it says it is stubbed, the function actually return a valid value. It doesn't seems to be the culprit to me, unless the app wait for a different path scheme to be returned or something.
I guess a relay log or debugging session would tell more about the issue, if anyone has the time and inclination to do it, unlike me...