I have the same identical problem. Doesn't even allow you to complete the setup with their webrowser app cause it can't find a single remote control. It just remains unconfigured. I can still use my old desktop slingplayer ap tho to configure it, but again with no remote controls.
I don't know if slingbox is going to fix this or not. Seems they are more interested in screwing up the older products to make people buy newer ones.
Please do a Forum Search for this problem. There are dozens of postings about this problem, some with the reason and the solution.
This is a good start https://community.sling.com/thread/1914?tstart=0