Server keeps closing it's self upon start up

I was playing on my server with 5 friends and we happen to get in the nether, but shortly after entering the nether (like 2-4 minutes) the server closes its self. now whenever the server finishes starting up it just closes its self again. I tried another server on a different account and that server works fine. Is there a way to fix this? (and yes I have 2 backups of the server saved)

I dont know if this is because I entered the nether or aternos bandwidth is having problems.

I started the server again after a few hours and it seems to be working fine now for some reason, because before it just kept closing its self even after waiting like 30-60 minutes.

here is the log anyway though.

https://mclo.gs/6UwyOAl

now im having a new issue. I forgot to mention its 1.12.2 modded minecraft, one mod called "weather2" or "localized weather mod", whenever thunder sound plays the server immediately closes (likely its a crash). I cant look at the logs or anything so I dont exactly know if its a crash or not. I tried using a different version of the mod and the same thing happens. (was using 2.6.12, then switched to 2.6.10 and same thing happened)

https://mclo.gs/XLnJyrJ

I kept an eye on the logs and the second lightning struck while I was in the server an error popped up in the logs, its on the bottom of the page

turned off the setting that makes lightning start fires, thank you.