Docusign Error: "Unable to obtain local issuer certificate"

Question

We are using Docusign RestAPI (PHP SDK) in the application and it is working fine. The authentication method is JWT. I want to use all the code I wrote on different subdomains but I get this error:

API call to https://account.docusign.com/oauth/token failed: SSL certificate problem: Unable to obtain local issuer certificate

My-domain.com and new.my-domain.com Both domains have SSL certificates installed. What should I do now? What did I miss?

Answer 1

DocuSign Public Certificates page lists all certificates.

Scroll down and look for:

Install the certificate on the server running the code.

Answer 2

The new subdomain runs on a different version of PHP. I added the certificate path to that php.ini file and it works fine now.