Hi Grant,
Thank you for the report. I was able to repro the crash you described both by using your repro project and by starting from a blank project. There is a missing repro step in your list, though: for the crash to occur from a blank project, at least one parameter must be added to the root state tree asset as well. Later, this parameter can be deleted and the crash will keep occurring.
If you don’t need parameters on your root state tree asset, you can recreate it and copy the contents from the original. The crash should not happen then.
I am filing an internal bug report now about this issue, and I will get back to you with a public bug tracker link as soon as one is available.
Best regards,
Vitor