Need help- Forge 1.20.1 Crash on attempt to create world

[Will1232]

I made the pack in forge 1.20.1 and it loads up perfectly fine, however it crashes when I hit single player. It opens up saying preparing for world creation, but before the buttons even show up it says saving world and my game crashes. I have done a lot of modding and can usually fix my issues, however this is new for me. I have attached my vrash report and my log below. Thanks for any help.

https://pastebin.com/V371NyUb - crash log

https://pastebin.com/jv4pt7YA - regular log

[TileEntity]

Make a test without DnT-woodland-mansion-replacement-v1.2 [Forge].jar