Cyberduck 9.5.4 bookmarks shows spinning cursor and license file not recognized after updating to macOS 26

[r-owen]

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Describe the bug

I see several issues that I think have the same underlying cause:

1: Cyberduck opens the Bookmarks window but it is empty and shows a spinning cursor.
2: That window also shows the software as unregistered, and the Cyberduck menu shows "Not a valid registration key", even though I requested a new copy and downloaded it (not that I had any reason to believe the old one was defective).
3: When I try to quit Cyberduck normally I see a "Thank you for using Cyberduck!... dialog with no way to close it. "Later" and "Buy in Mac App Store" are both grayed out.
4: When I right-click on the CyberDuck Dock icon it shows "Force Quit".

To Reproduce
Steps to reproduce the behavior:

1. Start Cyberduck
2. Observe the Bookmarks window being empty with a perpetually spinning cursor.

Expected behavior
I should see my bookmarks and my software should be registered.

Screenshots
Not applicable.

Desktop (please complete the following information):

• OS: macOS
• Version 26.6.2

Log Files
Please include the log file. You can reach the logging output in Preferences → Connection.

cyberduck.log

Additional context
Add any other context about the problem here.

[r-owen]

I tried removing "/Libarary/Application Support/CyberDuck" and "/Library/Preferences/ch.sudo.cyberduck.plist" and it made no difference (except the Bookmarks window was smaller).

[dkocher]

The log shows that ~/Library/Group Containers/G69SCX94XU.duck/Library/Application Support/duck does not seem to be accessible by Cyberduck.app. This is the directory where data should be migrated to from ~/Library/Application Support/Cyberduck which fails as well as creating any folders or files within.