https://bugs.winehq.org/show_bug.cgi?id=32316
--- Comment #32 from Esme Povirk madewokherd@gmail.com --- I made a winforms update to work around the object[] marshaling failure: https://github.com/madewokherd/winforms/commit/4f8a74382d9d1b79445350a1fa57f...
Then it asserted because winforms does something nonsensical, so I pushed another work-around: https://github.com/madewokherd/winforms/commit/f2ba6171aef54d8897baba0e0cb23...
With these changes, the program starts for me.