Server crash Exception in server tick loop

When I try to start the server I get this error: Exception in server tick loop
use forge 1.12.2

here is the record: https://mclo.gs/hItSPrA

and here is the crash report (I put it in pastebin because I don't know how to put it from the start) https://pastebin.com/raw/kRTdXd3u

almost always when I start it there are errors but it starts the same and I can play the same but now there is an error that if I crash the server

Quote from Opbeacon

con 40 errores?

¿Desea iniciar el servidor con 40 errores?

Quote from Opbeacon

with 40 errors?

You want to start the server with 40 errors?

Can u tell us the plugins u have?

there are no plugins on the server, only mods.

Quote from Opbeacon

what plugins are u using, and what kind of server is it? {skywars, bedwars, factions}?

If you mean mods, I can give you a list, but before the server started well, but today we don't add any new mod or anything

forget it and I solved it, I don't know why it happens but I took out the levelup2 and it worked thanks also for your help