Realms not allowing me to add addons/texture packs to the realm.

Everytime i try to put an addon or texture pack onto my realm it starts applying the pack, then says "All done!" then puts me back on the realms config menu. I then do the same thing then im put back in the same spot unable to put the addon or pack onto the realm forcing me to not add it into the realm. Ive tried many other packs or addons and its not worked its not just one pack its every single addon.