QlikView WebServer crashes or does not start.
In the Windows Event logs, many .NET System.ServiceModel.AddressAlreadyInUseException messages are logged.
Normally, the Qlikview Web Server (QVWS) service provides the settings required for the webserver. However, if using another webserver such as IIS then the Settings service needs to be running in order to provide the required settings. In summary:
Qlikview Web Server (QVWS) alone = good
IIS + Settings service = good
QVWS + Settings service = will not work
Ensure that no other service is listening on the same service ports as Qlikview Web Server (QVWS), i.e., ports 80, 4750, 4747, 4780, etc. as described in our public documentation.
Also see the article Qlik Service Starts and then Stops