This happened when the mod was added to my pack, latest version.
crash-2021-06-19_00.07.21-client.txt

If there is a mod that must be taken out, I hope it's an unnecessary one

You have too many blocks registered (hint: TFC adds a lot). Either install the mod Just Enough IDs, or remove mods until you're under the limit. This is a fundamental Minecraft limitation, nothing do here.