Тест API: http://192.168.1.241:25061/custom/mykanban/get_tasks.php

Ответ:

{"success":false,"message":"Database error: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'e.prior' in 'SELECT'","tasks":[]}

Декодированный JSON:

Array
(
    [success] => 
    [message] => Database error: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'e.prior' in 'SELECT'
    [tasks] => Array
        (
        )

)