Error in Workflow 2013 when I try assign task (HTTP Forbidden)

Question

Good morning. I have Sharepoint Server 2013 and Workflow Manager on two other machines with Windows Server 2012 standard. I need to use workfloows 2013, so when I'm trying to do some simple workflows as "send mail" or "change date in column".
When I have tried to do workflow with assign or "start a task process" it published normal, but when I have started this workflow, in first minute in status is running and have prevention:
Повторяется последний запрос. Следующая попытка будет выполнена менее чем через одну минуту. Сведения о последнем
запросе: HTTP Forbidden для http://sitentcngd.ntcngd.com/_vti_bin/client.svc/web/lists/getbyid(guid'e26ccab4-cd3e-41d4-a3e5-5f88603b113e')/ContentTypes; идентификатор взаимосвязи: a7979745-27cc-11dd-9ed5-3035c009dfb3; идентификатор экземпляра:
b4d5ed97-1e34-40c1-9aee-4290db6decc7.
But then it will stop with prevention:
RequestorId: a7979745-27cc-11dd-0000-000000000000. Сведения: An unhandled exception occurred during the execution of the workflow
instance. Exception details: System.ApplicationException: HTTP 403 {"x-ms-diagnostics":["30000000; reason=SSL is required"],"SPRequestGuid":["a7979745-27cc-11dd-b786-269bc5b64105"],"request-id":["a7979745-27cc-11dd-b786-269bc5b64105"],"X-FRAME-OPTIONS":["SAMEORIGIN"],"SPRequestDuration":["158"],"SPIisLatency":["0"],"MicrosoftSharePointTeamServices":["15.0.0.4535"],"X-Content-Type-Options":["nosniff"],"X-MS-InvokeApp":["1;
RequireReadOnly"],"Date":["Wed, 14 May 2014 06:00:36 GMT"],"Server":["Microsoft-IIS\/8.0"],"X-Powered-By":["ASP.NET"]} в Microsoft.Activities.Hosting.Runtime.Subroutine.SubroutineChild.Execute(CodeActivityContext
context) в System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) в System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager
bookmarkManager, Location resultLocation)
I just don't understand why it trying go to http, becouse i have setup Workflow farm for data exchange through https, register
to https too. 
Please help, I'm working with this problem 2 weeks.
P.S. In this video-instruction http://technet.microsoft.com/library/dn201724(v=office.15) do SSL, but when I'm checking
SSL I can't connect SQL, so I don't check SSL.

Answer 1

Hi Evgeny,
According to your description, my understanding is that the error occurred when you tried to assign task in 2013 workflow.
I recommend to execute the command below to get workflows properly registered:
$credential = [System.Net.CredentialCache]::DefaultNetworkCredentials
$site = Get-SPSite(<siteUri>)
$proxy = Get-SPWorkflowServiceApplicationProxy
$svcAddress = $proxy.GetWorkflowServiceAddress($site)
Copy-SPActivitiesToWorkflowService -WorkflowServiceAddress $svcAddress -Credential $credential -Force $true
Then re-register SharePoint with Workflow Manager services with the below sample command since HTTP is not required:
Register-SPWorkflowService –SPSite "http://FQDN:80" –WorkflowHostUri "http://FQDN:12291" -force
More references are provided in the below link which lists commands to be executed once after SharePoint 2013 CU has been applied:
http://technet.microsoft.com/en-us/library/dn133867.aspx
Best regards.
Thanks
Victoria Xia
TechNet Community Support