Cannot register SP2013 to a Workflow manager 1.0 server

I am trying to register workflow manager on my SP 2013 server.

situation:

we had workflow manager 1.0 installed on a server.  This server died and we don't have a backup of it (on purpose, it was not an important server).

Also if I do a get-spsite I can see https://sp.domain.com/

so I am not certain exactly what this error is referring too.

Now I installed workflow manager 1.0 on a new server and setup a workflow farm.  I can access the workflow website on the http port from the sharepoint server just fine.  Also if I do a get-spsite

PS C:\> Register-SPWorkflowService -SPSite "https://sp.domain.com/" -WorkflowHostUri "http://server-webapps:12291" -AllowOAuthHttp -Force
Register-SPWorkflowService : The remote server returned an error: (404) Not
Found.
At line:1 char:1
+ Register-SPWorkflowService -SPSite "https://sp.domain.com/"
-WorkflowHostUri "h ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~
    + CategoryInfo          : InvalidData: (Microsoft.Share...WorkflowService:
   RegisterSPWorkflowService) [Register-SPWorkflowService], WebException
    + FullyQualifiedErrorId : Microsoft.SharePoint.WorkflowServices.PowerShell
   .RegisterSPWorkflowService