Divi theme update not working via The Hub

glad to see new features added to the hub.
But there is still one issue for me: The Divi theme won't update through the hub.

The theme is marked as "Update available from WordPress.org" but always returns a "No data found" error, when I click the update button.

ElegantThemes Username and API Key are set & working correctly - so manual update from the WP backend works like a charm.

Any idea what is causing this?