Unable to detect page cache due to possible loopback request problem

In my WordPress website health check, there is an error:

Unable to detect page cache due to possible loopback request problem. Please verify that the loopback request test is passing. Error: Not Found (Code: http_404)

Then I check the loopback test and it is passed:

Your site can perform loopback requests

I search online and find this post: https://stackoverflow.com/questions/75683729/unable-to-detect-page-cache-due-to-possible-loopback-request-problem-please-ver

But it does not provide solution as well.

So how to fix this issue?

• This topic was modified 9 months, 2 weeks ago by chcw.