Steps leading to the problem:

 - Administrator creates a new key - it can be for a new user or just a new device for an existing user. 

 - The next step is to use the QR code to download the key to a device, typically a mobile phone.

 - The QR app opens the link and when you click the "Download Key" button on the download page, you get an error "Link is invalid, generic error"


 - The problem was identified to be wit the QR app, either it incorrectly scans the link, or using a wrong, possibly cached value.


 - use a different app. A list of recommended QR apps is