diff --git a/src/EventListener/AdminRouterSubscriber.php b/src/EventListener/AdminRouterSubscriber.php
index 6fc0212859..b8f7be4417 100644
--- a/src/EventListener/AdminRouterSubscriber.php
+++ b/src/EventListener/AdminRouterSubscriber.php
@@ -93,9 +93,12 @@ public function onKernelRequestPrettyUrls(RequestEvent $event): void
             // custom EasyAdmin route defaults/attributes to other existing Symfony routes. So, we have to
             // check if the route of the current request matches any of the cached dashboard routes
             $dashboardRoutesCachePath = $this->buildDir.'/'.CacheWarmer::DASHBOARD_ROUTES_CACHE;
-            $dashboardControllerRoutes = !file_exists($dashboardRoutesCachePath) ? [] : require $dashboardRoutesCachePath;
+            $dashboardControllerRoutes = [];
+            if (file_exists($dashboardRoutesCachePath)) {
+                $dashboardControllerRoutes = require $dashboardRoutesCachePath;
+            }
             // this is not a cached dashboard route, so this is case (3) a regular Symfony request
-            if (!array_key_exists($request->attributes->get('_route'), $dashboardControllerRoutes)) {
+            if (!\array_key_exists($request->attributes->get('_route'), $dashboardControllerRoutes)) {
                 return;
             }
         }