[BUG] No non-cloud structure generation working [1.21.1]

[DarianLStephens]

Describe the bug
No structures are generating, save for generic clouds.
/locating and /tp-ing to structures reveals just... nothing at the location, above or below ground
Generation seems to work normally in 1.20.1.

Expected behavior
For worldgen to work.

Steps to reproduce
Install the mod for 1.21.1 Fabric
Try to locate a changeling hive or any cloud structure
See nothing

Screenshots

Version Information:

• Minecraft Version: 1.21.1
• Mine Little Pony Version: N/A
• Unicopia Version: 1.3.13

Mod Loader:

• Fabric
• Quilt
• Neoforge (with connector)

Client/Server Logs
I haven't seen anything in the logs about failed generation, so I don't think it really matters.
The only instances of the IDs in the logs are my /locates.

[Sollace]

This is fixed but not yet released