When I put down a slab the game crashes. This doesn't happen all the time, as I was able to put down a thatch slab on top of a dark oak log. I was unable to put down a thatch slab on top of another thatch slab, and can't put down mossy cobblestone slabs at all.

Here is the error report:
The game crashed whilst unexpected error
Error: java.lang.NoSuchMethodError: net.minecraft.world.World.(Lnet/minecraft/world/storage/ISpawnWorldInfo;Lnet/minecraft/util/RegistryKey;Lnet/minecraft/world/DimensionType;Ljava/util/function/Supplier;ZZJ)V
Exit Code: -1