I am stunned. I bought this plugin months ago and now I find it’s been a waste of time. I followed your instructions to set up Mailchimp and then I found out tucked away in this forum that Mailchimp is no longer supported.
When I set no mailing service integration I get the same error highlighting around the email box. The plugin says the email has sent but it doesn’t actually send anything at all.
I have already followed your instructions to re-install the plugin if it’s not sending. Do you have a solution? Is there an alternative product on the market? Is it too late to get a refund?
And the same error-highlighting is shown on your demo page.
In summary: your plugin does not work.