When i killed the lich boss it dropped some enchanting books that have some kind of error that they shoulnt have like:
I AM ERROR.
LOOT TABLE ERROR - REPORT TO MOD/DATAPACK OWNER
Blowthrough IV
Illegal Enchantment

I dont know what i did wrong while downloading the mod or maybe something happend in the playthrough,
but i cant enchant them either or find them in the files of the modpack or minecraft itself.

If somebody knows an answer please reply to this Comment.

Thanks for help.