When I am trying to add downloadable product from back end at that time below error gets popped up
Link URL's domain is not in list of downloadable_domains in env.php
Magento has added this feature in latest 2.3.3 You have to whitelist the domains of those links through ssh in order to save them. To add a domain you have to run this command :
bin/magento downloadable:domains:add www.xyz.com
In order to get all whitelisted domains
bin/magento downloadable:domains:show
In order to remove a domain from whtielist
bin/magento downloadable:domains:remove www.xyz.com
You can refer to the CLI document