DataTables warning: JSON data from server could not be parsed. This is caused by a JSON formatting error

Question

I am using server-side DataTables in a project

and do a search, shows me the following error message:

DataTables warning: JSON data from server not could b

Answer 1

For newer versions of datatables,don't forget to remove this line from the server_processing.php file

/* REMOVE THIS LINE (it just includes my SQL connection user/pass) */
    include( $_SERVER['DOCUMENT_ROOT']."/datatables/mysql.php" );