https://bugs.winehq.org/show_bug.cgi?id=39870
--- Comment #30 from Pekka Helenius fincer89@hotmail.com --- Additional information to the previous message:
I ran further tests. It seem that the issue I described is valid for Wine-Staging only and affects all Wine-Staging versions after 2.17. With normal Wine versions Uplay doesn't crash (but I was unable to log in).
I couldn't narrow down the (Staging) commit which broke Uplay for me, however.