When creating a new Landing Page asset in Design Studio, an approved Landing Page template does not show up in the template drop-down list. Any attempt to clone an asset which uses this template throws error indicating it cannot be cloned.
In Design Studio, 1. Select the template in question on the left-hand side folder tree 2. On the right-hand side, mouse-over template name and click the pencil icon that appears on the right corner of template name 3. Change the template name to a temporary name 4. Click the pencil icon again and revert it back to the original name
This is due to corrupted template name which happens due to simultaneous edits or renaming of templates multiple times.