This one?
Seems like this would fix the problem.
Looks like the new interface (which is looking good) for selecting ports are breaking the Emby app.
So we should wait for another Emby update (i.e. 1.3.3)? Then we can go from 1.2.22 → 1.3.x?
@PaulMcG1970 it seems like 1.3.3 should fix it. 
Now we just have to wait for it.
Emby 1.3.3 update is working now.
The catalog has been updated to v1.3.3, which has resolved this issue. Refresh your catalog, then run the update. I have verified this fixed the issue.