I recently came across an error I hadn’t seen before when using Photoshop: “Could not use move tool because the target channel is hidden.”
You might also notice that your selected layer turned red. What exactly had I done?
Well, it turns out I had turned on Quick Mask Mode by accidentally hitting the Q key on my keyboard. So how did I get rid of this message? Simple. Just hit the Q key again or go up to the Select menu and uncheck Edit in Quick Mask Mode … and you’re back to editing normally.