Sorry for resurrecting an old post, but I ran into this same issue today. The weird thing is, it was working fine on Tuesday, and I had not changed a thing on it since then. But, when I opened it today, I got the same message you did. Infinite Loop detected in BP asserted during Construction Script. There is no code in my Construction script. There never was. Why is this not working all of a sudden when I have made no changes to my working code?