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