Can't launch any creative 1.0 session in my UEFN project

Hello, for about a month now, I haven’t been able to launch a creative session on one of my UEFN projects. Here are the error messages that appear when I launch the project on the UEFN (Photo1). I can’t seem to identify the source of the problem, although I’ve noticed this phenomenon after placing the Cloudy Condos prefab then removed it.