WeChat payment php official demo blank problem

I downloaded the latest official php payment demo and directly modified the necessary configuration information.
When paying, whether it is h5 payment or scan code payment, it always jumps to a blank page without any errors. Later, I tried many methods and finally solved the specific modifications. What is
This error is solved by modifying the file WxPay.Api.php, as follows:

Line 537

curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,TRUE);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);//Strict verification

to

curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);

curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);//Strict verification

The directory structure of the officially downloaded demo is used. A folder is added after the domain name.

The content is as follows:

But is this a coding error or an environmental problem?