Minecraft 1.20.1

Moonlight and Immersive Weathering both up to date.

The error? Just being in the world.
[08:59:01] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:02] [Render thread/ERROR]:
Signature is missing from Property textures
[08:59:02] [Render thread/ERROR]:
Signature is missing from Property textures
[08:59:02] [Render thread/ERROR]:
Signature is missing from Property textures
[08:59:02] [Render thread/ERROR]:
Signature is missing from Property textures
[08:59:02] [Render thread/ERROR]:
Signature is missing from Property textures
[08:59:04] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:04] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:05] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:05] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:41] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:41] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:46] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:46] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:47] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:47] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:49] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:49] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:49] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:49] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:51] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:51] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:51] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:51] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:52] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:52] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:52] [Sound engine/ERROR]:
Deleting stream buffers: Invalid operation.
[08:59:53] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:53] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:53] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:53] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:53] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer
[08:59:53] [Server thread/ERROR]:
Failed to handle entity type entity.immersive_weathering.falling_layer

latest.log

1. Just log in and play
2. Possibly might be from another mod, it doesn't ruin gameplay as far as I'm aware, might be causing FPS issues. Uncertain but it does spam the log.