Troubleshooting

Troubleshooting Checklist

Use these checks when something feels off inside Rate Lab.

No rates returned

• Verify rates is an array in your Liquid output; returning [] hides all offers.
• Confirm rendered_attrs in the Output panel contains the expected structure.
• Re-run the scenario and inspect backend logs for evaluation errors.

WebSocket isn’t updating

• Check the toolbar indicator—red means the Phoenix channel is disconnected.
• Ensure the function.id in your payload matches the active template channel.
• Try the Run button to force a manual refresh while the socket reconnects.

Authentication failures

• Refresh your Shopify admin window to regenerate App Bridge tokens.
• Make sure development environment variables for the embedded app are set.
• Confirm the Phoenix backend allows the origin you’re testing from.

Editor issues

• JSON validation errors appear inline; fix syntax before re-running.
• If Monaco stops responding, reload the route—state persists after reconnect.
• Disable browser extensions that inject scripts into Shopify admin pages.