Have you read the information above?

• Yes

Provide your logs.

https://mclo.gs/sTNbNQA

Describe your issue.

I noticed some errors in my log saying this mod was trying to register 1.21 items into certain tags. I checked the mod files and sure enough, it does do this.

You can check the logs to see exactly what tags are affected (search for minecraft/TagLoader). I'm unsure if this causes any real issues, especially with LMFT, but it surely couldn't hurt to fix.

This is intentional, I plan to drop 1.20.1 support very soon and this is the easiest solution to backport the v2 convention tags