PayPal SSL Errors


The system will not connect to PayPal® correctly.


Some PayPal® payment gateway modules require an HTTPS-secured connection to create the link between WHMCS and PayPal correctly.

If the WHMCS installation’s domain does not have a valid SSL certificate, the connection will not work.


To meet PayPal’s requirements:

  1. Make certain that you have correctly installed an SSL certificate. If you need to purchase an SSL certificate, go to
  2. Update the WHMCS System URL setting to begin with <https://> in the General tab at Configuration () > System Settings > General Settings.
For more information, see Update the System URL.

Last modified: June 5, 2024