4401Unable to populate data, please check if mandatory value is entered correctly.

4401Unable to populate data, please check if mandatory value is entered correctly.

i got error in zoho crm api my code is:

thanks in advance


public function zoho_Api(){
   
   $auth = "token here";

   
$xml ="<Leads><row no='1'><FL val='LAST_NAME'>lastname</FL><FL val='COMPANY'>abc</FL><FL val='EMAIL'> gmimail@test.com</FL><FL val='PHONE'>123456789</FL></row></Leads>";

   
  $result=$this->insert($auth, $xml);

echo $result;
   

}
public function insert($auth, $xml){
   
 
                    
   $curl_post_fields = "authtoken=".$auth."&scope=crmapi&xmlData=".$xml;
 
                     
   $ch = curl_init();
            curl_setopt($ch, CURLOPT_VERBOSE, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); 
   curl_setopt($ch, CURLOPT_URL, $curl_url);
   curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_TIMEOUT, 30);
   curl_setopt($ch, CURLOPT_POST, 1);
 
   curl_setopt($ch, CURLOPT_POSTFIELDS, $curl_post_fields); 
            $response =  curl_exec($ch);
            curl_close($ch);
   
   return $response;





   

}