Originally published at: https://managingwp.io/live-blog/updating-wordpress-page-error-updating-failed-the-response-is-not-a-valid-json-response/
WordPress Error “Not a Valid JSON Response” The “Updating Failed. The response is not a Valid JSON Response” error from within the WordPress Guttenberg Editor could be the result of a number of issues. If you do some googling, there’s lots of information and ideas on how to rectify the error. PHP Composer and Wrong…