After installing a SSL certificate, An AJAX HTTP request terminated abnormally.

It is very odd. Did you clear all caches after installing the SSL cert? If not, that alone could fix the problem.

I am inclined to think it is not the SSL cert diretly so much as the switch to https which is likely to cause a problem.

A few things to look into: Did you redirect all http requests to https? Is the problem path /file/ajax/field_juiceimage/und/form-rKYHN1Kbk5aYP4CWNtqXBzxJGszCvR0Qm5pmzy2yfaI calling URL with the http or the https protocol? If you are using php-fpm did you restart it when you restarted your server? Does changing browser help (since some paths may be cached, who knows--this is a wild guess)?

Hello, I'm getting the same error after having recently installed an SSL certificate. I don't think any other changes were made to the system other than the addition of the SSL certificate and web traffic being redirected to https:

Thanks,
Scott

X-Frame-Options option on server is a solution. Drupal AJAX as default us HTTP not httpS and when site request mismatch with ajax request content is blocked

"how to delete missclicked comments?"

I recently had an error like this. It was caused by Content Security Policy. The Ajax request was blocked by "default-src 'none'". To make it work, I had to add:

connect-src 'self'

So issue you linked to is still ridiculously not resolved.check this out

Depending on how important it is for you to keep AJAX errors when a request is terminated abnormally, you can avoid hacking core by injecting JS that redefines the Drupal AJAX error function.

Other developers even went as far as to redefine window.alert to avoid alerts of any kind appearing.

What I did was to inject the following JS in areas that end users visit suffering from unnecessary alerts when autocompleting is interrupted:

<script>
  (function($){
    Drupal.behaviors.CatchAjaxTerminationAlerts = (function(){
      return {
        attach:function(context, settings){    
          $.ajaxSetup({
            beforeSend: function(jqXHR, settings) {
              settings.error = function(jqXHR, textStatus, errorThrown) {
                {
                  if (window.console && console.log)
                  {
                    console.log(textStatus);
                  }
                };
              };
            }
          });
        }
      }
    })();
  })(jQuery);
</script>