The Edge browser is what comes with Windows 10 like the Microsoft Internet browser.
This error has got nothing to do with "Sky wanting you to upgrade to Sky Go Extra" as usually it is an issue on your pc so try what was posted above:
Hi I've had the sky go windows10 issue too - the fix is very easy (I stumbled upon it!!!)
Open the edge browser and in the top right corner of the screen you have - the minimise, resize and close. Below that on the next bar there are 3 dots - select this and in the drop down menu there is an option to open with internet explorer. This is the old version that allows SkyGo ........ select and your away