Server freezes and crashes whenever I join

Whenever I join my server, it suddenly freezes for a minute and then crashes. This happened suddenly for no reason, I was doing nothing different before it happened. I have removed all plugins, allocated more ram, etc but it still doesn’t work.
Error message in a pastebin because it doesn’t let me put it here:

best guess, check the randomTickSpeed gamerule, default is 3

Thank you very much! I forgot I was messing around with that because I couldn’t even access the server :man_facepalming: