Mod loader

NeoForge

Minecraft version

1.21.1

Mod version

15.10.3

Modloader version

21.1.208

Modpack info

No response

[IMPORTANT] If bug:

• I have confirmed this bug is reproducible on a minimal setup, not a modpack with many other mods.

[IMPORTANT] If bug: The latest.log file, not the crash report

No response

Issue description

HolderLookup.Provider is required to use most of the methods that write data to nbt. For example: Component.Serializer.toJson/FromJson, ItemStack.saveOptional/save etc.

resolved in Discord, I guess