Thanks for trying my plugin!
You don’t need an SSL certificate to use the plugin. The problem is not that your server doesn’t have SSL certificate but that your server cannot validate SSL certificate of the Amazon server where review forms are hosted.
The most likely reason is that you have outdated software on your web server. The error is caused by not having an up-to-date bundle of CA root certificates on your web server. This is typically a text file with a bunch of cryptographic signatures that curl_exec function uses to verify a host’s SSL certificate. You need to make sure that your installation of PHP has one of these files, and that it’s up to date.
Please see more information in the topic about similar problem here: https://ww.wp.xz.cn/support/topic/send-test-email-error/.
I hope it helps!
Thanks for your support, and prompt reply to my problem.
I am using an Abyss Web Server ‘Local Host’ account as a test bench for evaluating modifications for a live website, using a child Mystile theme, and WooCommerce.
I think that using my local host is the cause of my problem. From what I have found on your great plugin, I think this makes product reviews work on woocommerce, for guest purchases. I will try the plugin on my daughter’s live web site, and submit a review latter, thank you.
