Description of problem: Kindly remove the "fog-vcloud-director" gem from gem list in CFME 5.7 as vcloud-director is no longer supported in CFME 5.7 as per the latest release notes. Version-Release number of selected component (if applicable): CFME 5.7.0
You are correct in saying its not supported, the current decision is to leave it in place as is under the covers and shouldn;t be too visible.