Command blocks on Realms not working

Command Blocks are not working on my Realm. I have always been using command blocks on my realm for minigames me and my friends have made, parkour, and more. It was all working fine until I switched my world to a minigame, and then changed it back. I have made sure commandBlockOutput is true, but they won't work. I've tried to eneble them in my realms settings, but suddenly most of the settings are locked! What is happening?