Better Caves expected a ServerLevel, but got: loaderCommon.forge.com.seibel.distanthorizons.common.wrappers.worldGeneration.mimicObject.DhLitWorldGenRegion
Liquid regions will not be generated for this chunk. This may be fatal!
YungsBetterCaves-1.20.1-Forge-2.0.5
DistantHorizons-2.3.6-b-1.20.1-fabric-forge

Our console. Can confirm.

[14:25:58] [DH-World Gen Thread[0]/ERROR] [bettercaves/]: Liquid regions will not be generated for this chunk. This may be fatal!
[14:25:58] [DH-World Gen Thread[0]/ERROR] [bettercaves/]: Better Caves expected a ServerLevel, but got: loaderCommon.forge.com.seibel.distanthorizons.common.wrappers.worldGeneration.mimicObject.DhLitWorldGenRegion