Trouble with the tile pallette not working at all

So I’m not sure what I did wrong, but anytime I try to drag my tiles into the pallette they don’t apear there, and I can’t draw with them. I’ve tried dragging them with edit both on and off, so I’m not really sure what to do, anyone have any possible ideas?

This is a great tutorial, Unity 2017 - Tilemap tutorial - YouTube but I can’t figure this problem out, when I play the scene and move my character around, black lines seem to flash in and out of existence, any way to fix this? Great tutorial BTW :smiley: