Attempt to read property "nif" on null

#0 /var/www/html/red/loginapp.php(14): devel_error_handler() Array ( [errno] => 2 [message] => Attempt to read property "nif" on null [file] => /var/www/html/red/loginapp.php [line] => 14 [er] => 24565 [shell] => )

Attempt to read property "password" on null

#0 /var/www/html/red/loginapp.php(15): devel_error_handler() Array ( [errno] => 2 [message] => Attempt to read property "password" on null [file] => /var/www/html/red/loginapp.php [line] => 15 [er] => 24565 [shell] => )
{"status":"false","message":"Nif o contrase\u00f1a vac\u00eda"}