Mincecraft PE Unable to Connect to World

Hello,

 

I have a shared realm that I have played in for hours. There have been no recent changes to my account or the setup of the world. However, I can not access the world. I get the "Unable to Connect to World" error after the loading resources screen. There is a resource pack attached, but that has not stopped me before. Additionally, I can't even download the world to back it up. 

please help.