http://bugs.winehq.org/show_bug.cgi?id=58824
--- Comment #4 from winehq_bugzilla@yahoo.com --- Hi,
If i do sh winetricks dotnet6 between step 1 and 2 (without any other winetricks), this workaround the error : the game lauch fine and with Melonloader.
.Net 6.0 is the version of .net that was tried to be be downloaded when launching the game with melonloader installed.