Worlds Not Loading

After creating a new world in Realms, the world does not build. 

 

Description: I have purchased 5 subscriptions to Realms over a two month period and have not successfully been able to play on iPhone, or iPad.  The same symptoms have been seen on both platforms. I have been charged for the subscription.  When creating the world I received an error message (attached below).

I had successfully used Realms approximately 18 months ago. 

Symptoms: Upon opening app, and selecting play, the app searches for Realms worlds, but the only worlds that load are locally stored worlds. 

I have tried: restarting device, reinstalling apps, checking xbox live account, and waiting several days. The FAQs help topics do not reflect this issue.