Cyberduck Mac App Store edition "damaged and can't be opened"

[Xjs]

Describe the bug
Since today, I can't open the Mac App Store version of Cyberduck anymore. It says »“Cyberduck” is damaged and can’t be opened. Delete “Cyberduck” and download it again from the App Store.«

Even if I follow the instructions and delete & redownload it the error reappears. The website version from cyberduck.io works. (I copied my preferences file from ~/Library/Containers/ch.sudo.cyberduck/Data/Library/Preferences to ~/Library/Preferences so I can continue working for now.)

To Reproduce
Steps to reproduce the behavior:

1. Go to the Mac App Store
2. Download Cyberduck
3. Try to open it
4. See error

Expected behavior
Cyberduck opens without problems.

Screenshots

Desktop (please complete the following information):

• OS: macOS 14.1.1 (23B81), 2020 M1 MacBook Pro
• Cyberduck Version: 8.7.1 (Mac App Store)

Log Files
cyberduck.log from ~/Library/Containers/ch.sudo.cyberduck/Data/Library/Logs (I hope this is the right one)

cyberduck-crash.log
(from Console.app, with search filter for the string "cyberduck") — let me know if you need some more specific context from the logs.

Additional context
It definitely still worked yesterday (2023-12-14), not sure if it even did today in the morning.

[dkocher]

The output from the error log indicates an issue with the storekitagent that validates the purchase receipt to connect to the Mac App Store server.

error	15:33:27.450462+0100	storekitagent	ch.sudo.cyberduck: Failed to renew receipt for exit(173): Error Domain=ASDErrorDomain Code=603 "Request throttled" UserInfo={NSLocalizedDescription=Request throttled, NSLocalizedFailureReason=Unified receipt is valid and current}

[Xjs]

Thanks for the pointer. Good to know that nobody else seems affected. I have also contacted Apple's Support about this but I'm not very hopeful. Do you have any ideas on how I can proceed here to make it work again? If all else fails, can you convert my Mac App Store purchase into a non-app-store license?

[tatze96]

If you've started the App Store version successfully before, you should see a cyberduckreceipt file within the application support folder that'll be detected as a license for the standalone version from our website.

[Xjs]

Thank you! To whom it may concern, the App Store version started working again after the holidays for no reason apparent to me. However, if this happens again I should be able to use the cyberduckreceipt file, thanks for this pointer. :)

[Xjs]

As I wrote before, for me it started working again; however, the comment by @tatze96 regarding the cyberduckreceipt file in the application support folder would answer my initial concern should it happen again.