Page blanche après l'importation des données via odbc en php

<?php

//on fixe le temps max pour le script à 10 minutes
set_time_limit(600);

// Affichage des erreurs php
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);

//connexion
$conn=odbc_connect('test1','user','mdp');
if (!$conn) {
  exit("Connection Failed: " . $conn);
}

$rs1=odbc_exec($conn,'SELECT * FROM table1');
if (!$rs1){
  exit("Error in SQL");
}
// Déjà, avec une seule.. est-ce que ça marche ?
//  $rs2=odbc_exec($conn,'SELECT * FROM table2');
//  $rs3=odbc_exec($conn,'SELECT * FROM table3');



while (odbc_fetch_row($rs1)) {
$agen = [
    //"id" => $id,
    "Latitude" => odbc_result($rs1, "CLLATITU_N"),
    "Longitude" => odbc_result($rs1, "CLLONGIT_N"),
    "Nom_client" => odbc_result($rs1, "CLNMFA"),
    "Rue1" => odbc_result($rs1, "CLSFAM"),
    "Cp" => odbc_result($rs1, "CLCPFA"),
    "Ville" => odbc_result($rs1, "CLVILFA"),
    ];
  $tableauAgences['agences'][] = $agen;
}


echo json_encode($tableauAgences);

<?php
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
set_time_limit(600);
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
$conn=odbc_connect('lien','user','mdp');
if (!$conn)
  {exit("Connection Failed: " . $conn);}
$rs1=odbc_exec($conn,'SELECT CLLATITU_N, CLLONGIT_N, SANBON, SAMOT1 FROM W_SO.PCLIENT INNER JOIN PSAV ON W_SO.PCLIENT.CLNCLI = PSAV.SANCLI');

if (!$rs1)
  {exit("Error in SQL");}

$id=0;

while (odbc_fetch_row($rs1))
{
    $id++;

    $agen = [
        "id" => $id,
        "Latitude" => round(odbc_result($rs1, "CLLATITU_N"), 6),
        "Longitude" => round(odbc_result($rs1, "CLLONGIT_N"), 6),
         "No_de_SAV" => odbc_result($rs1, "SANBON"),
         "Motif_1" =>  odbc_result($rs1, "SAMOT1"),

      ];

      $tableauAgences['agences'][] = $agen;
    }
    
    // On encode en json et on envoie
    echo json_encode($tableauAgences);
?>