Yes apperently when I reload the Multiverse Plugins it breaks the world loading. A Server restart fixed that. Need to add a server Restart to the regen procedure too.
Also, I noticed that you died in the Nether (I read the chat) and you ended up spawned on top of the bedrock layer. When testing it two days ago, that hapened to me too. I think you can get out of it by returning to the Creative world and then reentering the protal.
I realize this is suboptimal, but I think it's the ghost plugin not correctly chiosing a respawn point. I don't think I can do anything about it.