I've done 2 runs on Lunatic, once with ReimuA and the other with ReimuB, and both times it has crashed during the Marisa fight.

Here is footage of the crash: https://drive.google.com/file/d/1Z9-3uyfVCtEx_l-jJI4F5RFDP5ifvCbO/view?usp=shari...

We need the entire error message so that we can investigate.

EDIT: Nevermind, we fixed it in version 2.0.