Using passwords in iCloud for windows

I'm having the same problem as several others. I cannot use passwords in my Apple keychain on my Windows 10 PC ... i.e. I cannot activate the "passwords" feature in "iCloud for Windows10".

I have downloaded the "iCloud for Windows10" app from the Microsoft Store onto my Windows10 machine. I have added the Apple password extension in my Edge browser. The icon shows in the right place on Edge, but it is greyed out with a slash through it. And the "Password" option/feature in my "iCloud for Windows10" app also greys out the Password feature. What else do I have to do to make this work?