Unable to open Password Manager. Repeated attempts take me to a page asking for email address OR directions to install app on my mobile device. This was not happening two days ago.
[Admin Edit: Clarified Subject]
What device and OS version are you using?
When you get this prompt for your email address, did you fill it in and then enter your Norton Account password? Occasionally with Norton Password Manager, you get completely signed out, including signed out of your Norton Account. This is done for security reasons.