Failed to verify APO works

What is the name of the domain?

pingpongsourcingcom

What is the error number?

N/A

What is the error message?

N/A

What is the issue you’re encountering

uptrends.com gave HTTP Protocol Error, didn’t return the three header responses

What steps have you taken to resolve the issue?

Clear browser cache
Turn off VPN

What are the steps to reproduce the issue?

The steps given in the article (Verify APO works | Cloudflare Automatic Platform Optimization docs)

Hi @jasonwang1,

I just tested with the same tool and received the following information. Please try a different city if the default isn’t working.

Hello @bujangnim,
Thank you for your reply. I checked your attached results against the documentation, and saw that the header CF-Cache-Status and cf-apo-via don’t have the correct values. What steps would you recommend I take to fix it?
By the way, with uptrends, I kept getting http protocol errors even with many other cities. What could be the cause?
Thanks.

I did a few more tests and also asked other people to test from their PCs, all returned the dreadful HTTP protocol error in red.

How would you recommend I avoid the error and get to the stage to investigate individual headers.

Please understand I’m not a technical user - I tried to follow some similar posts here but still struggled. Thanks.