diff --git a/src/Http/Middleware/BreadcrumbReplacement.php b/src/Http/Middleware/BreadcrumbReplacement.php
index e7a6bcf..b596315 100644
--- a/src/Http/Middleware/BreadcrumbReplacement.php
+++ b/src/Http/Middleware/BreadcrumbReplacement.php
@@ -81,6 +81,10 @@ public function handle(Request $request, Closure $next)
      */
     protected function isPageController($controller): bool
     {
+        if (empty($controller)){
+            return false;
+        }
+
         return ((new ReflectionClass($controller))?->getNamespaceName() ?? false) === "Laravel\Nova\Http\Controllers\Pages";
     }