After new Dev platform update 3.84 proxy doesn't work anymore

[Kellan-Shopify]

Hi Benjamin,

There was a known issue with App Proxies returning 404 errors after migrating apps to the new Dev Dashboard.

Our developers were aware of this and have since resolved this behaviour, however the fix does require clearing old proxy values and re-adding them in a new deployment, with the following steps:

1. Remove the app_proxy config from your app.toml
2. shopify app deploy
3. Add it back
4. shopify app deploy again

More details can be found in the following thread:

[Solved] App proxy deployment

UPDATE: The issue has been resolved, apps with App Proxy are safe to deploy on the Dev Platform. We are experiencing an ongoing issue related to app proxies for organizations that have been migrated to the Dev Platform. Existing app proxies may experience a 404 when you deploy your app. You can avoid the issue by holding on any app deploys. We will update this thread when the issue is resolved.