Can you check your dev console and see what error it may be throwing there and possibly the network tab to see what the last urls it is calling?
@astrra.space is the blob upload limit set low. Like maybe less than 14.5mb? yeah looks like it may be something on @witchcraft.systems side. sorry about that :/. Prob best to wait till we hear back from them. If it is and they get it resolved can re run the migrate process, but would just only uncheck the "create account" I bet none of the blobs have migrated yet. 
