Hello, I get this error I have not seen anyone postpone it.

Error: https://hastebin.com/lugobezuve.rb
V.mod : 2.13.5-218
Forge: 3.2.0

Maybe the error comes from JEI, he made an update 2 days ago.

This isn't a JEI problem specifically. JEI doesn't like an empty item being the input to a recipe, which it is in the case of the "minecraft:fire" heat properties recipe (which transforms fire to air when heat is removed), since the Fire block doesn't have an item.

The problem is harmless though, other than the recipe not showing up in JEI and the error being logged. It won't cause any other breakage. But I'll keep this open to remind me to find a better solution for it... possibly a custom PNC "ashes" block that fire transforms to, which either disappears itself or needs to be cleared by a player.

possibly a custom PNC "ashes" block that fire transforms to, which either disappears itself or needs to be cleared by a player.

Interesting. There is an opportunity here to flesh out the early game progression for players who play on Peaceful and have limited access to gunpowder. Mix Ash + Charcoal to get gunpowder perhaps.

So instead of the early game progression being either "Find TNT in a desert temple" or "Hunt creepers" you could just place fire next to a cold block, harvest the ash and combine it with charcoal to get gunpowder.

This would be cool, but the technical problem here is that JEI simply doesn't show recipes where the input item is empty (or air), which is the case for fire. Hence the error it's emitting here. This isn't a problem with JEI, but simply that Minecraft expects a recipe not to have an empty input (also that recipes normally tend to be about items, not blocks - so the heat properties recipes are a bit weird here).

And if JEI can't properly show how to get ashes, it would be pretty frustrating for players who need to figure it out (yes, a quest book could direct them that way, but that's not enough IMHO).

I'm not sure there's an easy fix here, but I will think on it.