API/Modloader
Forge 35.1.28
Minecraft 1.16.4
BYG 1.1.5

Describe the bug
When I create a new world or load a world I got this in the console:

[18:11:32] [Netty Local Client IO #0/ERROR] [minecraft/BiomeGenerationSettings]: Feature: Not a JSON object: "minecraft:freeze_top_layer"

To Reproduce
Add the mod to the modlist and watch the console when creating or joining a world.

Expected behavior
To not have these errors.

Additional context
I got the same issue with the Fabric version.

Logs
https://pastebin.com/3fbWGPZH

Fix but not released, keep an eye out for it