NikaraWorld

I'm not sure why this is happening but my game decided it was going to crash when I went to sleep and woke up in the abyss thanks to the abyss II mod. However upon waking up in the Abyss my game froze and crashed with java.util.ConcurrentModificationException: null error it's incredibly annoying because I was in the process of recording a video for YouTube when this happened. It seems like it has something to do with quarks improved sleeping module but i'm not sure. Crashlog latest.log

When I launch my 1.16.4 server the server crashes with a java.lang.NoSuchMethodError: null, I have no idea how to read the 1.16.4 crashlogs nor do I know what mod is causing the issue, I've attached the crashlog to the post crash-2020-12-20_03.26.54-server.txt

Even with morecrashinfo mod installed i'm even worse at reading crashlogs for newer minecraft versions, i'm building a 1.15.2 modpack and it's crashing at load with NullPointerException: null here is the crashlog, please help EDIT: I Think i may have figured it out