WeChat payment has no error code

What is returned is a Could not resolve proxy:30 error.
And the error output below is empty and nothing

The XML parameters are not missing. Can anyone help us find out why?

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What is returned is a Could not resolve proxy:30 error.
And the error output below is empty and nothing

The XML parameters are not missing. Can anyone help us find out why?

Are you setting the timeout parameters wrong?

<code>curl_setopt($ch, CURLOPT_TIMEOUT, $second);</code>

There is a special introduction to error codes in WeChat’s documentation.