[SOLVED] API give a 500 error

$fullUrl="localhost/ipmp_new/api/Parameter/list/all"; 
    $curl = curl_init($fullUrl);
    curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
    curl_setopt($curl, CURLOPT_USERPWD, "projeqtor:projeqtor");
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    $curl_response = curl_exec($curl);
    echo $curl_response;
    curl_close($curl);