restart service - Workflow Manager Backend
restart service - Service Bus Message Broker
restart service - Service Bus Gateway
restart service - Windows Fabric Host Service
recycle Workflow Manager application pool
restart WorkflowServiceBackend Service (using cmdlet or manuel)
cleared the sharepoint configration cache and restart SP timer service
reboot server
re-publish SP2013 workflow.
try 2010 workflow – it is work 2010 workflow but 2013 workflow is not solve.
iis reset
flush the DNS cache : cmd "IPCONFIG /FLUSHDNS"
Confirm User Profile Service from Central Administration and validated that user synchronizations were still occurring
try to Register-SPWorkflowService -SPSite 'https://SiteCollectionURL' -WorkflowHostUri 'http://workflowhost:12991' -AllowOAuthHttp –Force
prompt error :
Register-SPWorkflowService : Could not allocate space for object 'dbo.Objects'.'IX_Objects_Version' in database 'SharePoint_Config' because the 'PRIMARY' filegroup is full. Create disk space by deleting unneeded files, dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. 