Tree of Gold (by Pathway Studios) texture pack wont apply to a realm.

Hi, I play minecraft on the xbox one and run a realm, and am having trouble adding a texture pack to the realm. The texture pack is tree of gold by pathway studios which I bought specifically for this realm. The texture pack works on a copy of the world and on all my local worlds aswell. I've already tried to uninstall the texture pack and reinstall it as well as minecraft itself but nothing's working. If you could help or find a solution it would be much appreciated!