What am I doing wrong?

[fx2ki]

So, importing textures into Cubik isn't the problem, cuz I can see it clearly like this

https://prntscr.com/cz3dmu

So i replaced the redstone_ore texture with the Japanese part in the middle, but it shows up as a broken purple and black texture normally. In the picture, i reset my textures to the default, but otherwise it would still be purple and black

https://prntscr.com/cz3f6e

What am I doing wrong? Could someone tell me? Logs don't show anything wrong.