https://bugs.winehq.org/show_bug.cgi?id=44154
--- Comment #3 from Isaac Smith isaac@isrv.pw --- On further research, icudt60.dll only contains data, not code. See https://sourceforge.net/p/icu/mailman/message/35967643/
Since this works fine on Windows, perhaps it is a Wine bug? It certainly blocks programs requiring it from running.