In SharePoint Designer 2010, I was attempting to create an approval task for an item. When I tried to added the action to the workflow, I received the following error.
Cannot insert this action. To use task process actions, the Office SharePoint Server Standard Site features must be enabled for this site by an administrator.
At the site and site collection I made sure SharePoint Server Standard Site features was enabled. Taking it one step further, I also enabled SharePoint Server Enterprise Site features. Still the workflow wasn’t working correctly. Navigated back to the site collection features and activated the Workflows feature. Refreshed SharePoint Designer and all of the actions worked.
Credit goes to Giles Hamson.