Same thing here, we thought it’s from our side. We did debug it and made sure every letter is correct. It redirects to product page then to to home page with a toast error : “XYZ” not added. There is a problem with the app block. Contact the app developer.
Topic summary
Developers are experiencing an error when using deep linking to add theme app extension blocks: “There is a problem with the app block. Contact the app developer.” The issue appears inconsistently and has specific triggers.
Key findings:
- Error occurs primarily when installing blocks on new themes (not previously used themes)
- The problem may involve using incorrect extension UUIDs for different environments (staging vs. production)
- Deep links redirect users to the wrong page (e.g., Home page instead of Product page)
Workarounds identified:
- UUID retrieval method: Add the extension via theme editor, access the theme’s code editor, open the relevant template file (e.g.,
templates/product.json), and extract the correct UUID from the markup - Cookie permissions fix: Enable third-party cookies for
admin.shopify.comin browser settings (Safari, Chrome, Firefox). One user confirmed this resolved their issue completely.
Status:
- Shopify team (Liam) acknowledged the issue and is investigating
- No official fix available yet
- Multiple merchants are reporting the problem, causing frustration for app developers
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