Error when updating from the App Store

[account_disabled]

I started trying to download the update from Affinity Photo v.1.4 to v.1.4.1 on Jan 22. Two days later I'm still getting the error:



"Affinity Photo failed to download. Use the Purchases page to try again."



When I go to the <Purchased> tab of the App Store, I get the same error.



Is this something Affinity can fix, or do I need to start troubleshooting with Apple?



Thank You!!!


I didn't find the right solution from the Internet.
References
forum.affinity.serif.com/index.php?/topic/17410-error-when-updating-from-the-app-store/
Startup Video