I'm having an issue with updating my mod version

So I was making a mod in 1.20.1 for Forge that basically added a bunch of new stuff such as Colored Wood, Apatite, Microlite, Copper Swords, and other stuff. I just tried updating it to NeoForge 1.20.4 and now it's stuck in an endless loop of failing and workspace closing. I'm pretty sure this is a softlock and if this issue isn't fixed, I can say goodbye to the mod.