https://bugs.winehq.org/show_bug.cgi?id=54157
--- Comment #5 from Zeb Figura z.figura12@gmail.com --- Probably WINEDEBUG=+mountmgr and look for dbus traces. If compiled without dbus, you'll see a single message to that effect; if dbus was present at compile time but missing at runtime, you should see a message to that effect too.
In this case... can you please attach a log with WINEDEBUG=+mountmgr,+file,+seh,+pid?