Hallo dudes! I had the exact same problem as you guy i couldn't play for days?! I searched the web for a solution and i found one that actuelly worked!
Step 1: Go to your system settings, storage, hardrive, profiles.
Step 2: Choose your profile and press delete. Remember to press ''Delete profile only''
Step 3: After you deleted your account go back hardrive, mark harddrive and press Y, then press the ''Clear System Cache'' option.
Step 4: Now try to redownload your profile to your xbox, it should work now and the ''add security'' thingy won't bother you anymore.
I can't promise you it will work, but i can insure you that it's worth a go! :D
Sorry for my bad english i'm from Sweden :)