Issue with non vanilla blocks in datapack

I'm currently trying to implement a "vanilla debug stick" with which I can change the state of blocks.  As a base I used the "Redstone Rotation Wrench" from Vanilla Tweeks. 
I was able to add other block e.g. stairs but I now face issues with blocks from another mod.
The mod https://www.curseforge.com/minecraft/mc-mods/diagonal-walls adds diagonal walls and replaces the normal walls. 
The problem that I now face is that the walls are called e.g. "diagonalwalls:minecraft/stone_brick_wall". Whenever I use this in my datapack I get the "Errors in currently selected data packs"
I did try it with the normal stone_brick_wall name and then the error did go away, so it has to do with the name.