SharePoint 2013: The option for the SharePoint 2013 Workflow platform is not available

Problem

I administer a SharePoint 2013 farm.  I had a user who wished to create a workflow using the new SharePoint 2013 Workflow platform.  When the user connected to a website on the farm, using Designer 2013, and then launched the Create workflow process for a list, the following message was displayed in the Create dialog:

The option for the SharePoint 2013 Workflow platform is not available because the workflow service is not configured on the server.  Please contact your server administrator.

This message seemed odd since I knew I had installed the Workflow Manager 1.0 on the application server just fine.  I begen troubleshooting.

Troubleshooting

1. Check software installation:
1. Workflow Manager 1.0 installed to application server.
2. Workflow Manager Client 1.0 installed to all SharePoint servers in farm.
2. Check workflow services are running.
1. These should be running on the application server hosting Workflow Manager.
2. The following services were verified as being started:
1. Service Bus Gateway
2. Service Bus Message Broker
3. Windows Fabric Host Service
4. Workflow Manager Backend
3. Check the Workflow Service Application Proxy was started and connected.
4. Check that the workflow service was registered for HTTP and a valid URL existed (Get-SPWorkflowServiceApplicationProxy).
5. Check that the Workflow Management Site is started  and correctly served the service configuration schema (h-t-t-p://AppServer:12291).
6. Check that the Workflow Management Application Pool was started.
7. Check that web front end reboot after workflow manager client installation.

Solution

1. Install the Workflow Manager Client on all web front end servers.
2. Reboot each server after installation.

References

• Install and configure workflow for SharePoint Server 2013
• Troubleshooting Workflow Manager 1.0 Management and Execution
• Installing Workflow Manager 1.0
• Use Windows PowerShell cmdlets to manage workflow in SharePoint 2013
• Register-SPWorkflowService
• Get-SPWorkflowServiceApplicationProxy
• Get-SPFarmConfig
• Find the Workflow Service URL for a SharePoint 2013 Farm
• The option for the SharePoint 2013 Workflow platform is not available
• what is opposite of "Register-SPWorkflowService"???