My slingbox is connected directly to the internet (NOT wIfI and not vi a powerline connection - directly to the switch). I can watch it over wi-fi via connected laptop using Google Chrome. So I know the Slingbox is connected to the internet just fine.
I am using iPhone 6, slingbox app version 2.0.21 - I am connected to the same wifi as my laptop was, in the same room as router - Excellent internet connection. Have FIOS with 1GB up and down - so that is not the issue.
It is just the app that I cannot use. - I deleted the app and reinstalled it as well. Same issue with my iPad App. Happens even when I shut down WiFi on phone and go with a strong LTE signal so I know it is not my internet connections to sling and devices. There has to be something going on with the App because I watch fine over wifi via chrome on Laptop.