Artisan Error when generating Raphael Solver

Hello. When I'm generating Raphael Solvers, it sometimes pops up the following error message:

[Artisan] called `Option::unwrap()` on a `None` value

The only exception is Armorer. On that class, it ALWAYS fails for no apparent reason.

Any help would be greatly appreciated. Am I doing something wrong or is it a plugin issue? I have no idea.