If you get the following error messages while trying to update to latest version of Membership Pro of your site:
Error Failed to download package. Download it and install manually from https://www.joomdonation.com/index.php?option=com_dms&task=download_update_package&document_id=56.
First, please make sure you are having an active subscription of the extension (subscription will be valid one year when you purchase). If your subscription is expired, please renew it.
Check and make sure you already configured Download ID as described at https://membershipprodoc.joomservices.com/getting-started/installation#use-joomla-update
If you already configured Download ID, maybe that Download ID was used on a different website already (could be on dev version of your site). In this case, login to your account on our website, access to https://joomdonation.com/download-ids.html , generate a new Download ID and use that new generated Download ID for your website