I’m having the same error since the release of 5.5 and 5.5.1. Even when pressing the “Force Update Cloner” button. Sometimes I have better success when I create a new level with New Open World as opposed to a new Empty Level or Basic. Here’s a video of the problem.
I guess apple users can’t complain when the platform is free. However, I do see this as a valuable product and hope this issue is resolved along with Niagara fluids that also don’t work with Apple.