What's the issue you encountered?

Upon placing a hanging empyreal sign in my world, my game crashed. Now every time I open my world, my game immediately crashes with this error message.

The game crashed: rendering block entity Error: java.lang.NullPointerException: Cannot invoke "net.minecraft.client.resources.model.Material.buffer(net.minecraft.client.renderer.MultiBufferSource, java.util.function.Function)" because "$$7" is null

How can the issue be reproduced?

Immediately crashes when loading world.

Logs

https://gist.github.com/trashdonut/c62471e8ee715967af399c5bee5c54b1

Mod Version

1.21.4

Additional information

No response

Fixed with 0361a06