I'm assuming you are using eclipse- but if you aren't i can't help.
Try de-installing everything, then re-installing it. If you have mods saved, back them up.
Hello, my name Is MinecraftDonut and I am new to Forge. I thought using a "Sprite Sheet" for my blocks would be worth a shot- but I have run into a problem. Whenever I load up the game, I get a "Missing Texture" on the block. So I was wondering if anybody could tell me where I would put my custom texture folder for my sprite sheet?
Help would be much appreciated.