Try to add echo to see where is the problem

Source/API/script/Config/ConnectClass.php

@@ -21,7 +21,7 @@ class ConnectClass{
     function connect(): int|Connection
     {
         try {
-
+            echo "OKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK";
             $connection = new Connection($this->dsn,$this->login,$this->password);
 
         }catch (PDOException){

Source/API/script/Gateway/GatewayForm.php

@@ -14,8 +14,9 @@ class GatewayForm
     public function __construct()
     {
         try{
+            echo "ici???";
             $this->connection = (new ConnectClass)->connect();
-        }catch(PDOException $e){
+        }catch(PDOException){
             throw new PDOException();
         }
     }

Source/API/script/index.php

@@ -46,7 +46,8 @@ $app->get('/', function (Request $request, Response $response) {
                 $ok = true;
                 $response->getBody()->write(json_encode((new $gateway)->$method($parameters)));
             }
-        }catch (PDOException $e){
+        }catch (PDOException){
+            echo "ici?";
             throw new PDOError($request);
         }
     }