Task Manager 2; "Security Review" Tasks errored when attempting to postpone or complete and "Account Review" Tasks could not be completed

Attempting to Postpone or Complete a "Security Review" Task failed with the following error:

"This item type does not support completing or postponing."

You can now Postpone and Complete these items. Additionally, "Account Review" items can now be completed (previously, the "Complete" button was disable in the grid).