I purchased two copies of Quform PHP. One copy is up and running fine, but the second copy for the same client but different website is returning the error
There was a problem An Ajax error occurred.
but the contact form message is sent and received.
The hosting platform is the same for both websites, both use the same number of field names (the site with the error doesn’t use reCaptcha and is not set up for it), the SMTP setup for each uses the credentials for the specific site, and debug mode is on for the site with the problem.
This is the link to the test contact form with the problem: