How to fix the “Updating failed. Error message: Unexpected end of JSON input” error in WordPress when trying to update a post using the Perfmatters plugin? I just found a fix!
My first step was to try disabling WordPress plugins to see where origin of the error was. I found the Perfmatters plugin was causing the error. Given this plugin is essential for running my WooCommerce shop at https://jerrybanfield.com/shop/ I knew I had to play with the plugin settings rather than disable it. I found a fix easily by testing different settings.
Simple TURN OFF disable Google Fonts and the error goes away! Easy money!
Now, you can read the post: John Bura | How I Got Into Creating and Selling Courses.