Server Crash

So I recently set the randomtickspeed value to high and my server crashed. After a while I managed to run /gamerule randomtickspeed 3 to set it back to default (at least my server says that it succesfully set it back). But then everytime I join the server I time out and the server crashes shortly after leaving a giant log of error messages that I dont understand. Log: https://mclo.gs/0aknpXy

Thanks man. It worked. The spawnworld was deleted but thats no big deal. My friend is already working on a recreation of it. (We didnt build much there so it should be very easy to recreate everthing). Thanks again.