So my server keeps crashing I'm not sure why but i want to know how to fix it

this is the log for my aternos server

it worked fine for like 30 minutes then my friend set a fire and we assumed that was the problem so we turned off fire tick and extinguished the fire and it worked again for a couple minutes and stopped working again

I think I figured it out I have quests enabled and every time I try to turn in the quest it crashes. Thank you for your help guys.