Ensure that the workflow 2013 actions feature is activated. This feature has web site scope.
If while activating you get an error, use SharePoint Management Shell to activate the feature.
Enable-SPFeature -Identity 03f76ccc-56b2-462c-98bd-ae424538d534 -Url webSiteURL -Force
If the feature is activated, you should reactivate it. To make this use SharePoint Management Shell - Enable-SPFeature and Disable-SPFeature commands.