DataTables warning (table id = 'example'): DataTables warning: JSON data from server could not be

Allan,

"editor" was purchased and it was installed, the following message appears.

DataTables warning (table id = 'example'): DataTables warning: JSON data from server could not be
parsed. This is caused by a JSON formatting error.

The version of PHP was 5.3.12 although he thought whether to have been a version of php.

"editor" uses 1.2.3 and "datatables" uses 1.9.4.
It installs with a setup of the following sites and has not changed other than config.php.

http://editor.datatables.net/tutorials/installing

Please teach me how to avoid an error.

Regards,
iijima