make sure your os meets specs.
if it does, try using a different network.
if several networks fail the same way, uninstall your current ir and then install that latest version.
I saw this on the LR Blog comments:
You’re latest 1/17 iOS of adobe lightroom for IPad is upon updating reporting app is not comptiable for,your,device running iOS 10.2
So it seems that it may be the same problem?
That is the point I think, I have also iOS 10.2 on my i-Pad
just waiting for the Apple update....