Assistance Required: Shopify Page Speed and Facebook App Error

Technical Q&A

Topic summary

  • Issue: During a Shopify page speed test, the browser console logs an error: “WebSocket connection to ‘ws://localhost:12387/’ failed: Error in connection establishment: net::ERR_NOT_IMPLEMENTED.” This suggests a WebSocket connection attempt is failing during the test.

  • Additional problem: There is also an unspecified Facebook integration error. No technical details or reproduction steps were provided for the Facebook issue.

  • Evidence: A screenshot was shared (Shopify CDN link) that appears central to understanding the errors.

  • Requested support: Assistance to resolve both the console/WebSocket error seen during page speed testing and the Facebook app/integration issue.

  • Context and terms: WebSocket is a browser feature for persistent client-server connections; console errors are diagnostic messages output by the browser. Category: Technical Q&A; tag: javascript.

  • Status: No fixes, decisions, or action items reported yet; the request remains open with key questions unanswered.

Summarized with AI on December 12. AI used: gpt-5.
1

Hello Team,

We have encountered an error with our Shopify page speed. When we try to test it, the following error is displayed:
“Browser errors were logged to the console (WebSocket connection to ‘ws://localhost:12387/’ failed: Error in connection establishment: net::ERR_NOT_IMPLEMENTED).”

Additionally, we are facing an issue related to Facebook integration. Could you kindly assist in resolving these errors?

Here is the image URL for reference:
https://cdn.shopify.com/s/files/1/0494/7361/8072/files/Screenshot_2024-12-18_171516.png

Looking forward to your support.

Screenshot 2024-12-18 171516.png
Screenshot 2024-12-18 171516.png959×297 14.7 KB

1 Like