My server stopping when I try to enter

So I was playing on my server with fisk superheroes, was just flying at iron man suit when server died, I starded server again and all was good, but when exactly I'm tried to enter server, server stopping, I really don't know what to do and this is last server message in log

Quote from Log

The state engine was in incorrect state SERVER_STOPPING and forced into state SERVER_STOPPED. Errors may have been discarded.