Error when Patch Manager executes a task

When Patch Manager runs a task, the following error is displayed in the console: 

There are no available management servers to run the task.

1. Log in to Patch Manager as an administrator.
2. In the navigation menu, expand Patch Manager System Configuration and select Patch Manager Servers.
3. In the Actions Pane, click Patch Manager Server Wizard.
4. Select Edit an existing Patch Manager server configuration settings and click Next.
5. In the Server Name drop down, select the management server that you prefer to use for the Management Group.
6. In the IP Address field, enter the IP address of the management server.
7. Complete the remaining fields as required, and click Next. 
8. Click the Management Group drop-down menu and select the management group to associate with your Patch Manager server.
9. Click the Server Role drop-down menu and select Primary Application. 
10. Click the Server Role drop-down menu and select Primary Application if this is your primary server. Select Management if it is a separate server.
11. Complete the remaining fields in the window, and click Next. 
12. Review the settings, and click Finish.