Just remove the device and re-add it. If you haven't got any device changes left, contact Sky and they'll grant you another.
The new platform uses a completely different DRM system, so can't share device IDs with the old Silverlight one.
If you do go to Virgin, then you'd still have to use Sky's player for cinema & sports.
Not sure whether this is now resolved. I encountered a similar issue upon installing the new desktop app today. The PFE 9500 error was resolved when I actually connected a speaker to my computer. So the new Sky Go player will not work without a soundcard or a speaker connected.
Try checking to see if there are any updates for your drivers and try uninstalling the App and delete the Cisco Videoguard Player folder in AppData > Local > Cisco > VideoGuard Player and AppData > LocalLow > Cisco > VideoGuard (delete this) and the Sky Go/Sky folders in App Data > Roaming.
Then try installing the app again.
MacBook Pro on high sierra......downloaded the new app Several times as instructed.......still getting error messages PFE9001 / 9202 so not able to view anything at all. Any answers as to what needs to be done to rectify this problem as the ‘technical support’ people at sky don’t know the answer. I’d have thought that before releasing a new app, the developers would have been clever enough to make it work....they are the ‘techies’ we’re the customer.......obviously they are not as clever as they think they are. We all pay a fortune for what generally is a good product.....but in this case it’s not good enough. Going to write to the CEO next week as see if he’s clever enough to sort this problem.....but I’m not going to hold my breath.
Thanks for the info, but I've already tried that, obliterating everything Cisco and Sky Go related from my computer as part of my previous attempts to get it working but it makes no difference 
Maybe they should rename it Sky No!!! 
[Edit] All video drivers etc. are bang up to date too
Maybe see if it works if you roll back the drivers?
When I try to watch Sky Sports on the Sky Go App (Mac Version) I immediately get an error PFE 9302. How do I fix this error?
caesarome - cheers. that worked for me
Hi,
After a couple of days, I've finally been able to fix it on my laptop. I got the answer from here http://helpforum.sky.com/t5/Sky-Go-Apps/Error-code-7005/m-p/2815889#M56524
I had tried uninstalling both Sky Go and Cisco Videoguard a few times without success. However, I did a search on my C:/ for Cisco and deleted and then uninstalled everything Cisco Videoguard related. Then uninstalled Sky Go player and finally emptied my recycle bin.
Reinstalled Sky Go, took a little longer than usual due to what seems like actually reinstalling the Cisco Videoguard player (which is the problem and also causes really annoying frame stuttering issues), seriously Sky, the web version worked flawlessly, and that fixed the issue for me.
Does it make the Sky Go app work though, or do you get the same errors?
Okay so much for that idea then
Any money it works if you swap out that 1080ti for another card. I swear that videoguard crap blocks certain GPUs.
Sort it out Sky.
sky go app does not open when i open skygo app in windows10 using internet explorer it will not open
I know that I am not alone in struggling with the new Sky Go App. I (eventually) got as far as sound but no picture ....
Is it possible to access the "old" sky go website - I had to access via Internet EXplorer and have Silverlight installed.
Does anyone know the relevant url ?
Clear your browser cookies and use exactly the same URL as before
Note: This is only a temporary work-a-round as the silverlight version will be gone for good soon
Even after clearing cookies the old link ( http://go.sky.com/#!/live/2306 ) directs me to a page where I can download the new app. So no joy.
Same problem. typical sky, need to spend more on software developers