I accidentally garbled a logon and needed to log on https://identitysafe.norton.com to edit it. I find that after I enter the Vault password the page crashes trying to load my logons. I get this screen:
The screen flashes about once very two seconds. My guess is that the browser or a server widget crashes trying to load the history, which is where the whirling circle of dots is. This is repeatable; done it a dozen times in the last 20 minutes or so.
Using Norton Security, just ran Live Update, Check for New Version show current software is up-to-date.
System is Windows 10 Professional on a desktop computer, browser is Firefox 54.0 (32-bit). Privacy is set not to accept 3rd party cookies. Turning off Ghostery has no effect.
Just tried it with Microsoft Edge and login to Vault works OK. No, switching browsers is a non-starter.