Proxy setting screen reflects no values and does not allow values to be set.
I can go and add values to the various input box, i.e Script address, Proxy server address, the hit Save and as soon as I navigate away from the page and then come back the input boxes are blank.
If I try to configure the proxy via the Internet Options in Control Panel, again, I can fill the input boxes and make any choices for configuration but I cannot save, hitting the OK button does nothing. The window remains open until you hit cancel.
I have four Window 10 boxes. All are behaving the exact same. All are on Version 1703.