New data packs

New snapshot:

I've watched all videos of how to make your own data pack with recipes and programmed it myself, But i don't get what's wrong.

It is reasonable that this would happen in a snapshot but also resource packs don't work for 1.12.2, is that supposed to happen?

Also I am going to send you a file that I made my own custom recipes in and can you please tell me what's wrong with it if it doesn't work? It was in the datapack file. The folders are in the right place following Minecraft instructions. Also what is a namespace?