With the introduction of Printix Client version 1.3.619.0, Sign in will happen via a browser window. The Sign in page will open in the computer's default browser as a new tab.
The new method reduces the risk of sign in issues and allows for easier troubleshooting.
In previous versions of Printix Client, Sign in would happen via the Printix Client window showing a web page presented by the Windows Embedded web browser. The old embedded method could be prevented from working if the Security settings for the Microsoft web browser (Edge or Internet Explorer) were configured in a special way.