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Here is the whole Error MEssage.

Symfony\Component\Debug\Exception\ FatalThrowableError
in src/Adapter/Translations/TranslationRouteFinder.php (line 207)

         */
        private function isModuleUsingNewTranslationSystem($moduleName)
        {
            $module = $this->moduleRepository->getInstanceByName($moduleName);
            return $module->isUsingNewTranslationSystem();
        }
    }

TranslationRouteFinder->isModuleUsingNewTranslationSystem('50') in src/Adapter/Translations/TranslationRouteFinder.php (line 128)

                case self::MODULES:
                    $moduleName = $propertyAccessor->getValue($routeProperties, '[module]');
                    // If module is not using the new translation system -
                    // generate a legacy link for it
                    if (!$this->isModuleUsingNewTranslationSystem($moduleName)) {
                        $language = $propertyAccessor->getValue($routeProperties, '[language]');
                        $route = $this->link->getAdminLink(
                            'AdminTranslations',
                            true,
                            [], 



TranslationRouteFinder->findRoute(object(ParameterBag)) in src/PrestaShopBundle/Controller/Admin/TranslationsController.php (line 127)

         * @return RedirectResponse
         */
        public function modifyTranslationsAction(Request $request)
        {
            $routeFinder = $this->get('prestashop.adapter.translation_route_finder');
            $route = $routeFinder->findRoute($request->query);
            $routeParameters = $routeFinder->findRouteParameters($request->query);
            // If route parameters are empty we are redirecting to a legacy route
            return empty($routeParameters) ? $this->redirect($route) : $this->redirectToRoute($route, $routeParameters);
        } 


TranslationsController->modifyTranslationsAction(object(Request)) in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php (line 151)

            $this->dispatcher->dispatch(KernelEvents::CONTROLLER_ARGUMENTS, $event);
            $controller = $event->getController();
            $arguments = $event->getArguments();
            // call controller
            $response = \call_user_func_array($controller, $arguments);
            // view
            if (!$response instanceof Response) {
                $event = new GetResponseForControllerResultEvent($this, $request, $type, $response);
                $this->dispatcher->dispatch(KernelEvents::VIEW, $event); 



HttpKernel->handleRaw(object(Request), 1) in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php (line 68)

        public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true)
        {
            $request->headers->set('X-Php-Ob-Level', ob_get_level());
            try {
                return $this->handleRaw($request, $type);
            } catch (\Exception $e) {
                if ($e instanceof RequestExceptionInterface) {
                    $e = new BadRequestHttpException($e->getMessage(), $e);
                }
                if (false === $catch) { 



HttpKernel->handle(object(Request), 1, false) in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php (line 200)

            $this->boot();
            ++$this->requestStackSize;
            $this->resetServices = true;
            try {
                return $this->getHttpKernel()->handle($request, $type, $catch);
            } finally {
                --$this->requestStackSize;
            }
        }


Kernel->handle(object(Request), 1, false) in admin6203a4hwz/index.php (line 86)

    $request = Request::createFromGlobals();
    Request::setTrustedProxies([], Request::HEADER_X_FORWARDED_ALL);
    try {
        require_once __DIR__.'/../autoload.php';
        $response = $kernel->handle($request, HttpKernelInterface::MASTER_REQUEST, false);
        $response->send();
        $kernel->terminate($request, $response);
    } catch (NotFoundHttpException $exception) {
        define('ADMIN_LEGACY_CONTEXT', true);
        // correct Apache charset (except if it's too late)