update

routes/web.php

@@ -12,8 +12,10 @@ use Illuminate\Http\Request;
 */
 
 Route::get('/', function (Request $request) {
-    if (config('v2board.app_url') && ($request->getSchemeAndHttpHost() !== config('v2board.app_url'))) {
-        abort(403, 'forbidden');
+    if (config('v2board.app_url')) {
+        if ($request->server('HTTP_HOST') !== parse_url(config('v2board.app_url'))['host']) {
+            abort(403, 'forbidden');
+        }
     }
     return view('app', [
         'title' => config('v2board.app_name', 'V2Board'),