🆙 More fixes 🆙

Updated_Cms/app/Http/Middleware/SetThemeMiddleware.php

@@ -18,6 +18,8 @@ class SetThemeMiddleware
             Theme::set($theme);
         }
 
-        return $next($request);
+        $response = $next($request);
+        assert($response instanceof Response);
+        return $response;
     }
 }