Initialization of the QMC and HUB failed on Web server (Proxy) using URL
When accessing the Qlik Sense Management Console (QMC) and HUB using URL https:\\proxyservername\qmc and https:\\proxyservername\hub a blank screen is displayed after entering login credentials for windows authentication. We can access the QMC and HUB on the same server using localhost.
Following error message is displayed when form authentication is used even when using correct credentials: The following user is not authenticated domain\user
In the proxy node server log below error is encountered: Error during stream authentication as Server Authentication failed because the remote party has closed the transport stream. We tried to resolve the above using support article : https://support.qlik.com/articles/000069832 but the issue is still unresolved
We observed the below errors in the network console of browser: Internet Explorer: Error 401 Chrome: Error 403
Are you accessing the URL using the default virtual proxy or do you have a different virtual proxy configured?
If you are accessing through a virtual proxy then the prefix also should be mentioned in the URL. But from the errors you have mentioned above seems the issue is with authentication not being successful for the user.
Are the users authenticated via AD or some SSO? You could check the web network traffic at developer tools to see where exactly is the request/response is failing?