Supplementaries incompat?

[Piotr1628]

Supplementaries since 3.5.0 shows that when launching game.

[thatcrazgurl]

I have the same issue with this and the following error from log: Exception caught during firing event: Cannot invoke "net.minecraft.world.level.block.Block.m_49966_()" because the return value of "net.minecraft.world.item.BlockItem.m_40614_()" is null

Verified it's Design n Decor. The error disappears after removing the mod. Able to launch with it installed, but crashes the world on startup.

Additional Information Edit: I was able to use a debugger and it is the belt_connector returning null.