ok, here's what happened: while testing some stuff in creative, I pulled out the allthemodium alloy blade from the creative menu, and then the game crashed as soon as I put it in my inventory. i had nothing else in my inventory except for some spawn eggs (some of them from this mod, if that matters), and a backpack with spawn eggs. And whenever I tried to reenter the world, the game would immediately crash. it wasn't until I removed good ending did this issue end. anyway, here's the (2) crash reports produced from the crash. can this issue be fixed?
crash-2023-02-02_20.59.41-client.txt
crash-2023-02-02_20.59.42-server.txt

This is the same issue as #7 -- you need to remove the item from your inventory with a tool like NBTEdit before you can play again, and then when giving yourself the item, you need to use /give to add an NBT tag to it (doesn't have to be anything specific, anything will do) rather than taking it from the creative menu.