Values with "é" or "è" cause responses to show NULL

[ludesign]

This is a wide known issue; You must encode characters to utf8 before passing them to json_encode. Add this piece of code

// map to utf8 to avoid broken json
$result = array_map('utf8_encode', $result);

right after (below)

if($result = $this->db->fetch_array()){

in lib/arrest-mysql.php file.