Server is not reachable or still initializing

Cognos Controller Web 10.4.2
Microsoft Windows 2019 server

User browse to Controller web and get a message

Server is not reachable or still initializing, please refresh the page in a few seconds

Possible Solution:

Depending on the URL you enter in your Internet Explorer you will succeed or not.

This give above error


If you enter the FQDN like this it will work!/Login

The error can also be that you are to fast, the controller web will need some time to start up.

More information: