Curl: (60) SSL certificate problem: unable to get local issuer certificate error, curlissuer

Curl: (60) SSL certificate problem: unable to get local issuer certificate error, curlissuer

This problem occurs because HTTPS authentication is not configured for a trusted server. By default, cURL is set to not trust any CAs, that is, it does not trust any server authentication. Therefore, this is why the browser cannot access your server over HTTPs. When this problem occurs, the best way for network programmers is to specify a set of default trusted CAs, provided that you have purchased certificates from these CAs.
If your content is not sensitive, a quick way is to skip the ssl check item before using curl_exec:

Curl_setopt ($ ch, CURLOPT_SSL_VERIFYPEER, false );

SSL error 86 Solution

Error message: unable to verify the security certificate unable go get local issuer certificate.
The English error message is translated as "unable to obtain the certificate issuer" because the CA certificate for this certificate is not installed on your computer.

What you need to do is to obtain the CA certificate of the certificate and install it on your computer.

How to install certificates for wget and so on in Linux

Let's take a good look at wget's help. Add the-no-check-certificate option and try it.