https://bugs.winehq.org/show_bug.cgi?id=38436
--- Comment #6 from Austin English austinenglish@gmail.com --- (In reply to Olivier F. R. Dierick from comment #4)
The bug reporter's original issue was that steam was installed with winetricks, which makes 32bit wineprefixes. Both GTAV and Social Club are 64bit programs and need a 64bit wineprefix.
winetricks does not make 32-bit prefixes. It warns if using a 64-bit prefix for some verbs that require 32-bit prefixes, but it doesn't force 32-bit anywhere.