Development error shown below

object(NoticeException)#33 (8) {
  ["message":protected]=>
  string(26) "Undefined index: client_id"
  ["string":"Exception":private]=>
  string(0) ""
  ["code":protected]=>
  int(0)
  ["file":protected]=>
  string(147) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/apps/base_default/modules/v4UserLoginAmazonEcho/controllers/v4UserLoginAmazonEcho.php"
  ["line":protected]=>
  int(255)
  ["trace":"Exception":private]=>
  array(4) {
    [0]=>
    array(4) {
      ["file"]=>
      string(147) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/apps/base_default/modules/v4UserLoginAmazonEcho/controllers/v4UserLoginAmazonEcho.php"
      ["line"]=>
      int(255)
      ["function"]=>
      string(9) "{closure}"
      ["args"]=>
      array(5) {
        [0]=>
        int(8)
        [1]=>
        string(26) "Undefined index: client_id"
        [2]=>
        string(147) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/apps/base_default/modules/v4UserLoginAmazonEcho/controllers/v4UserLoginAmazonEcho.php"
        [3]=>
        int(255)
        [4]=>
        array(2) {
          ["path"]=>
          string(111) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/config/3_Behome247_alexa_enroll/amazonechoapp.php"
          ["required_fields"]=>
          array(4) {
            ["client_id"]=>
            string(26) "stg-behome-smart-homeskill"
            ["response_type"]=>
            string(4) "code"
            ["state"]=>
            bool(false)
            ["scope"]=>
            string(26) "stg-behome-devices-control"
          }
        }
      }
    }
    [1]=>
    array(6) {
      ["file"]=>
      string(147) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/apps/base_default/modules/v4UserLoginAmazonEcho/controllers/v4UserLoginAmazonEcho.php"
      ["line"]=>
      int(9)
      ["function"]=>
      string(21) "authorizeAlexaRequest"
      ["class"]=>
      string(21) "v4UserLoginAmazonEcho"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(0) {
      }
    }
    [2]=>
    array(6) {
      ["file"]=>
      string(101) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/codeigniter/system/core/CodeIgniter.php"
      ["line"]=>
      int(322)
      ["function"]=>
      string(11) "__construct"
      ["class"]=>
      string(21) "v4UserLoginAmazonEcho"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(0) {
      }
    }
    [3]=>
    array(4) {
      ["file"]=>
      string(83) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/public_html/index.php"
      ["line"]=>
      int(357)
      ["args"]=>
      array(1) {
        [0]=>
        string(101) "/opt/mios-portal/stg/3_Behome247_alexa_enroll/develop_d1b9bee/codeigniter/system/core/CodeIgniter.php"
      }
      ["function"]=>
      string(12) "require_once"
    }
  }
  ["previous":"Exception":private]=>
  NULL
  ["severity":protected]=>
  int(8)
}