A task targeting the Notification Server timed out and failed. The targeted agent shows as connected to a task server.
There was an unmanaged duplicate computer resource with the same host name targeted instead of the intended managed computer resource.
Release: 8.6
Troubleshoot where the duplicate, unmanaged, computer resource is coming from and if needed, create a Computer or Resource Merge task to merge the two computer resources.
Alternatively, prevent the import of the duplicate computer resource and delete the existing unmanaged computer resource.