Thanks for getting in touch with us here on the Community.
I have been having a look around in regards to what could be causing the problems and came across one of our forums. The members on the thread were able to resolve the issue so thought it would be a good idea to share this with you.
My experience is the desktop player doesn’t work on all Windows 10 PCs. I have had 4 laptops i have tried it on, worked perfectly on three of them, but no matter what I tried on the 4th, nothing worked. One significant difference was it had an AMD processor rather than an Intel processor, but every other application I ever threw at it worked.
Have you tried to download from the windows store itself, to see if that makes any difference, if you completely uninstall the app and then reboot your PC and then download the app again. This can work with the issues that you've been having.
Alternatively have you tried to access the Sky Sports player via any web browsers on the Sky Sports site?