utchbe

Great help from the developer! Here was the final response in case anyone else runs into this issue.

Ok, problem is in your CURL php library setup, error is returned on your server is:
“SSL certificate problem: unable to get local issuer certificate”
You can check thread for setup guide here https://stackoverflow.com/questions/17478283/paypal-access-ssl-certificate-unable-to-get-local-issuer-certificate (there are actually paypal problem, but same error – in CURL library).
I made temp fix in /wp-content/plugins/Ready-UPS/ups/mod.php file – disabled SSL verification:
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

Awesome, thanks!

Thanks for your response but that is not the issue. I am selecting a payment method, when I click next with a payment method selected and that is where I am receiving the above error. I went ahead and added a Test Flat Rate shipping option, and that allows me to proceed with no issues. It is only using the UPS extension that I paid for.