Optimized Lottie JSON - Stuck Optimizing

Optimized Lottie JSON export seems to be stuck on the “Optimizing…” stage. I’ve been waiting a few hours. Tried refreshing, restarting, etc. Tried Chrome and Firefox. Any ideas?

I had this happen. I just re-uploaded it and it seemed to work, other times I would come back after a day or so and it would work.