Make sure the license of product you try to update (theme/plugin) is activated at dashboard of your site successfully.
If you update Hotel Booking plugin the license should be activated at Dashboard > Accommodation > Settings > License
If you update theme the license should be activated at Dashboard > Appearance > Theme License
It is also possible to download the latest version of product from your MotoPress account and update it uploading newer files over the exiting ones on your server.
If you purchased plugin or theme from third party marketplace you should be able to get latest version of product at marketplace account and update the product manually.