I've been having the exact same issue! It happened last month and I had to wait until the end of the month to use it again, annoyingly. I have managed to use it once this month without issue but again, today the same problem occured. So when I try and replace the 'new' device it says its saved, but it doesnt work. And then asked you to do it again. So you try twice more, unsuccessfully, and then you're locked out until the end of the month, again. Great. Football season starts today! #sadface
It only seems to affect Windows devices and I have been using Chrome. It appears to occur after every Windows system update, of which, they are frequent and numerous. I do not have this problem when using my Ipad. It appears to be a fairly common problem and the device management can only be reset by VM...
Please can someone help resolve this? I couldn't get a response last month other than a link to the "How to replace a device" page, which does not help in resolving this issue in any way.
Thanks in advance