My friends and I were happily playing on a modded Aternos server. The lag was annoying so we decided to switch from forge to magma to incorporate some plugins to help with lag, but now when anyone connects it shuts down. I did some research but nothing seems to fix this. It doesn't state that the server crashes it just says offline. https://mclo.gs/GilyEt1 this is the error right before it stops.
EDIT: I changed the server back over to forge and its working now, still unsure as to what caused this. Any response will be greatly appreciated.