This is caused by a requirement that a Port has not been allowed or opened.
Port 7466 in Active Roles 7.4 is used for SignalR communication for the Starling notifications in the Active Roles Web Interface. When this Port is not open, there is a significant delay when viewing the Active Roles Web Interface.
If Starling is not in use or configured, then this Port should not be required but due to this issue the Port must be open to assist with performance. This cannot currently be disabled.
The following Defect ID 216315 has been created to review this requirement in a future release of Active Roles to not require this port to be opened when Starling notifications is not configured.