Ryan Joseph David Krueger

OH GOD FINALLY! okay, so it turns out that it wasn't command block. it was that my friend summoned 50-billion fire charges in one area which crashed the server. I finally fixed it in singleplayer. Sorry for wasting your guys time, I'm going to go kill my friend (not really)

okay, so MCedit doesn't work on 1.16.5... infact, it doesn't work any any version that's not from 1.7-1.11. So that doesn't work

Thank you all of you, I will try this ASAP and see if that fixes the problem.