Also seeing the same issue in our app. Have written to Shopify Support but have not yet heard back.
Topic summary
Warning banner in Shopify Admin states some apps may stop working on September 20, 2024 due to App Bridge/Admin domain changes. Multiple developers of custom/private apps report seeing it, even after updating.
Common updates implemented (sometimes still leaving the banner):
- Upgrade to App Bridge v3 and include the Web Vitals script.
- Set correct Content Security Policy (CSP).
- Initialize App Bridge with apiKey and host; add meta tag with api_key.
- Use the CDN version per the latest docs.
- Verify initialization by running in the app iframe console: shopify.toast.show(“Hello”).
Resolution reported by several:
- After confirming the above, contact Shopify Support via Partner Dashboard > Support > “Shopify App Store or Theme” topic.
- The banner is supposed to auto-clear but may not; support can escalate to the dev team. Some saw it removed within hours after review.
Status: Partially resolved. The fix is to ensure compliance and then request Shopify to remove the banner. Some developers are still awaiting support responses; no official reason for delayed auto-removal provided.