problem with gmail + trello ?

[Omer]

To Trello Support,

My Android app is completely stuck on a "Not synced" status. The internet connection is stable and active. I tried switching networks and force-stopping the app - nothing works. I cannot log out and reinstall because I will lose unsynced work. Need an immediate solution to force the sync.

Screenshot attached.

Omer

[Caity · Accepted solution]

It seems that you're running into this issue: https://jira.atlassian.com/browse/TRELLO-1608

There's currently a fix in progress for this issue. In the meantime, I'd suggest going to that page and selecting Start watching this issue on the right panel. That way, you'll be notified via email whenever there are any updates.

As a workaround, if you're looking for ways to create cards directly from your inbox, you can try out our email-to-board or email-to-inbox feature explained here: Create cards by email

[Lissie Gonzalez]

404. That’s an error.
The requested URL /addon-link-not-allowlisted was not found on this server. That’s all we know.

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This error indicates that a Google Workspace Add-on is attempting to redirect to a URL that has not been approved or allowlisted in the extension's code. It typically surfaces when using Google Drive, Gmail, or Google Calendar integration add-ons—such as Atlassian Trello or DocuSign—and clicking an internal button that opens a new browser window. 

Why This Is Happening
Missing Manifest Prefix: Recent Google security patches require third-party developers to explicitly declare all valid redirect link prefixes (openLinkUrlPrefixes or urlFetchWhitelist) in the add-on's layout file. 
Developer Regression Bug: If a developer updates their web routing but forgets to update the Google Workspace Workspace settings, Google will block the action and trigger this /addon-link-not-allowlisted 404 message. 

Yes, this confirms you are experiencing a known Atlassian developer regression bug currently impacting the Trello for Gmail Add-on.
This specific bug is actively being tracked by the engineering team under ticket TRELLO-1608. Because the problem stems from a missing redirect configuration inside Trello's backend manifest file, it cannot be fixed by changing your browser settings or reinstalling the app

Work in progress.

[Arkadiusz Wroblewski]

Hello and Welcome to Community @Omer 

Have you already had a chance to find and review this official KB article?

It includes several official recommendations related to the issue you are facing:

Troubleshooting Trello for Android | Trello | Atlassian Support