Steps to Reproduce the Bug

1. Upon Joining Server its doing it

HK 4th Wall-V-1.2.zip

There is an Export of Mods

Expected Behavior

Should see item Name

Actual Behavior

Showing Tooltip Error, See Logs

Mod Pack URL (Optional)

No response

Mod Pack Version (Optional)

No response

Extra Notes (Optional)

No response

latest.log

https://gist.github.com/ToxicTerror86/7b610b38abf5076015a084bd70877a68

#3432 kind of the same I think

Edit: Try reverting to "jei-1.20.1-forge-15.2.0.27" it fixed things for me

I had the same issue (custom modpack) with 15.3.0.1 ans 15.3.0.4. Reverting back to 15.2.0.27 resolves the bug.

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Please try the latest release of JEI from today, I updated it to try to contain the damage from broken tooltips a bit better.

Duplicate of #3432