Reason Of The Issue: This error appears when editing WordPress posts or pages on your website.
WordPress needs to communicate with the server while you are editing a blog post. It relies on getting responses from the web hosting server in the background. This response is usually in JSON format which is used to quickly transport data using JavaScript.
Solution of The Issue:
1. Log in to the WordPress admin panel.
2. Goto general setting sections and check the WordPress Address(URL) and Site Address URL.
3. Now in the setting section go to the permalink setting and fix the permalink for WordPress.
4. If the issue has not been fixed check the codes of the .htaccess file and write the codes of .htaccess file once again.
5. If the problem will not get fixed rename the plugin folder enable the debug in wp-config file and check which plugin is conflicting and deactivate/uninstall the plugin from the WordPress admin panel.
