DoctorDJ

This post can be closed, we figured out the issue. This issue was the mod Grue. I assume the server was trying to spawn in the mob but it couldn't.

the server puts out an internal server error anytime someone digs down or goes into a dark area. We assumed it is a lighting error but we aren't sure what would do this. we tried on a single player world but it doesn't boot us on there. There isn't a crash report so I cant really give one