Package-manager forces port 80 in download URL/file path
When clicking Export, an alert pops up with the text The package has been exported <...> The path to the exported package is:.

After closing the alert, the path is also displayed next to the Copy to clipboard button.
The path contains :80 in the path, after the hostname, which means that the URL does not work with HTTPS protocol.
If I remove :80 then the URL is correct and the export downloads.
I must add that we are running DreamFactory via Docker, behind Docker Flow Proxy, which maps port 443 externally to port 80 internally. That is why the function Environment::getURI() returns port 80 as the SERVER_PORT. This is called from function saveZipFile in Package.php in df-core.
This issue should actually be migrated to the df-core repo.