"The option for the SharePoint 2013 workflow platform is not available because the workflow service is not configured on the server."

You have configured SharePoint 2013 and Workflow Manager. You have created a new Site Collection. You’re unable to create SharePoint 2013 workflows (but SharePoint 2010 workflows works).

Problem: The site collection was created using the blank template, which doesn’t include all necessary dependency features for creating workflows.

Fix: You need to enable the hidden feature WorkflowServiceStore using PowerShell.

Enable-SPFeature -Identity WorkflowServiceStore –Url $yourUrl


Credit goes to Anuja Bhojani (blog) for finding this nugget.