Unable to open flow. Error: Action Type Definition is missingIssue After deleting a Flow Designer action definition, some flows cannot be opened and it shows the error: Action Type Definition is missingReleaseNew YorkCauseDeleted action definition makes a flow action empty. We don't recommend to delete any flow Action Type Definition records, but if the issue happens, you can try the following options.ResolutionOption 1: Go to System Definition > Deleted Records and in the list, try to find the deleted action type definition and recover it. Option 2: Go to [instance URL]/sys_hub_action_instance_list.doSearch for the flow that is giving the error message, e.g. filter on flow name.Further filter the list, search for any record that has empty Action typeMake a backup (export XML) of the found sys_hub_action_instance record, and delete it.Repeat until the error is gone. note: for option 2, you will have to do the same for any subflows that are being called