I've applied the resource pack and then run that command. It still shows as a blank rectangle. Using vanilla Minecraft 1.13.2. Edit: Oh, now I see. There was a missing ' " ' character in default.json file. Also, it should point to the "custom:icon.png" and the 'icon.png' should be at "*/custom/textures/" folder.
I've applied the resource pack and then run that command. It still shows as a blank rectangle. Using vanilla Minecraft 1.13.2.
Edit: Oh, now I see. There was a missing ' " ' character in default.json file. Also, it should point to the "custom:icon.png" and the 'icon.png' should be at "*/custom/textures/" folder.