Just curious, do you have your default browser set to allow pop-ups and redirects? Signing in with SSO should launch a webpage to your SSO login, but if your browser doesn't allow the redirect you will not be able to reach it.
I've had no issues accessing the SSO pop-up. It's in that next step that's failing. However, this appears to be linked to my company VPN, so will continue to troubleshoot with them first.
