 	}
 
 	func selectedContainer() -> Container? {
+		guard folderPopupButton.selectedItem?.isEnabled ?? false else { return nil }
 		return folderPopupButton.selectedItem?.representedObject as? Container
 	}
 }

private extension AddWebFeedWindowController {
	
	private func updateUI() {
		addButton.isEnabled = urlTextField.stringValue.mayBeURL
	}

	func cancelSheet() {

			return
		}
		
		guard let container = selectedContainer() else { return }
		AddWebFeedDefaultContainer.saveDefaultContainer(container)

		delegate?.addFeedWindowController(self, userEnteredURL: url, userEnteredTitle: userEnteredTitle, container: container)
