(solved) get nbt block not working

I'm making a redstone dust like block but with infinite range, so I made a nbt for the block. however, whenever the 'get nbt tag of block at position' block is called, it returns -1, which is what it returns if what the position called doesn't have a block entity.

turns out I forgot to check 'enable block entity' :/

also, is it "a nbt" or " an nbt"?