I have a Premium account but I haven't been on it in months. When I used to use it, it worked just fine. But now it won't let me destroy blocks. When I click on a block to destroy it, nothing happens. I am still able to look around and do everything else. PLEASE help! Thanks in advance.
If it's single player it sounds like your map is on adventure mode. You can't destroy blocks in adventure, you need to make the world as survival.