https://bugs.winehq.org/show_bug.cgi?id=43146
--- Comment #5 from Sebastian Lackner sebastian@fds-team.de --- (In reply to ben from comment #4)
Hmm I have the libgtk-3.so.0 library in /usr/lib64.
Perhaps wine is looking for a 32-bit version of it?
Yes, for 32-bit applications you will also need the 32-bit version of all dependencies.