Minecraft Realms

My minecraft realms will not work, i have tried eveything and nothing seems to take effect. Closing the realm just stays on closing, i cant connect to it or switch worlds PLEASE HELP

It remains on closing forever, but connection takes a while and just says could not connect, try again later

My friends realms work fine.

This may have been caused by us messing around with command blocks, ender dragons and whithers in the end.