http://bugs.winehq.org/show_bug.cgi?id=58421
--- Comment #4 from win.user tst1@mixbox.pl --- I tried everything you suggested and it seems that this (experimental) WoW64 mode is responsible for all those problems - with every Windows program (not just MT4) under wine-10.9. So under wine-10.9: "wineboot -u" generates errors and "winecfg" generates the same errors and neither MT4 nor any other Windows program is starting.
After creating a new clean winprefix, there are still errors (although slightly different) and nothing starts up.
All the errors generated by the individual attempts I posted below: https://pastebin.com/3RDNRnri
Fortunately, wine-10.2-2 is working.