Perhaps because the application configuration is not set up properly for end-point. However, the agent check never failed at any point, and I'm too tired to go check the end-point configuration for Event Broker service.
Error message is:
Operation aefb9eb8-b07c-4331-97f8-f818af653f89 failed in operation list with id 24120bff-cc78-4154-80af-81d708957f0b for the following reason. This is retry number 2: System.InvalidOperationException: Could not find endpoint element with name 'IdentityBroker' and contract 'Unify.Framework.IChangesAvailableAdapter' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this name could be found in the client element.
at System.ServiceModel.Description.ConfigLoader.LoadChannelBehaviors(ServiceEndpoint serviceEndpoint, String configurationName)
at System.ServiceModel.ChannelFactory.ApplyConfiguration(String configurationName, Configuration configuration)
at System.ServiceModel.ChannelFactory.ApplyConfiguration(String configurationName)
at System.ServiceModel.ChannelFactory.InitializeEndpoint(String configurationName, EndpointAddress address)
at System.ServiceModel.ChannelFactory`1..ctor(String endpointConfigurationName, EndpointAddress remoteAddress)
at Unify.Product.EventBroker.StandardOperationListExecutor.RunCheck(ICheckOperationFactoryInformation checkOperation)
Customer support service by UserEcho