ooops :(

Time: 2019-03-03 12:38:18 GMT
Description: Exception ticking world

java.lang.IllegalArgumentException: Cannot get property PropertyInteger{name=layers, clazz=class java.lang.Integer, values=[1, 2, 3, 4, 5, 6, 7, 8]} as it does not exist in BlockStateContainer{block=minecraft:stone, properties=[variant]}
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:209)
at net.minecraft.block.BlockSnow.isReplaceable(BlockSnow.java:159)
at shadows.deadly.gen.BrutalSpawner.canBePlaced(BrutalSpawner.java:56)
at shadows.deadly.gen.BrutalSpawner.generate(BrutalSpawner.java:46)
at shadows.deadly.gen.WorldGenerator.terrainGen(WorldGenerator.java:35)

full crash log inc modlist (lots of mods to conflict with inc JustEnoughIDs ... just guessing ..):
https://paste.dimdev.org/afugoyuyix.mccrash