UPDATE: its an issue with one of my mods all is well now
the first crash happened when i went to the nether with my friends, is it due to insufficient aternos ram?
Running on forge 1.12.2
my aternos mod files
Deadly Monsters 1.71.jar
Hwyla-1.8.26-B41_1.12.2.jar
Reforged-0.7.5-1.12+.jar
champions-1.12.2-1.0.5.jar
fossilsarcheology-8.0.0.jar
furniture-6.2.0-1.12.2.jar
jei_1.12.2-4.14.4.267.jar
llibrary-1.7.17-1.12.2.jar
memory_repo
mutatedmobs-1.0.8.jar
u_team_core-1.12.2-2.2.4.94.jar
useful_backpacks-1.12.2-1.3.1.13.jar
worldedit-forge-mc1.12-6.1.8-dist.jar
forgeessentials-1.12.2-12.3.56-server.jar
log