This is the first server I've ever created, and this is the first time I've played with mods, so I have no idea what I'm doing or how to fix what is happening. As the title says when my friends and I tried going to the nether we all crashed maybe three minutes later, every time we tried to come back on it's crash again and we had to one by one leave the nether as quick as possible. I tried again on my own to see if it was an issue of all of us being in the nether causing issues, or if it was something else, and even when it was just me on the server standing next to the portal in the nether it crashed.

Here's the crash log, no idea what to make of this. If I understand it correctly the midnight lurker is the one causing the issue, but I don't know how to fix it.