could be a mod collision but crash reports is hard to read. mixin problem though
latest.log
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Looks like a conflict between limitless.
Tax Free Levels is meant as a (partial) replacement for it, so it makes little sense to use both.

The reason why I made this mod in the first place is because limitless is very invasive in its changes, it has many incompatibilities and even breaks datapacks.

Needless to say, I won't try to add compatibility for it, so choose either mod, not both.

yep, over enchantment mod is a good replacement.