Relative path in URL is not properly encoded when redirecting

Closes #3130512

src/EventSubscriber/StageFileProxySubscriber.php

@@ -162,6 +162,7 @@ class StageFileProxySubscriber implements EventSubscriberInterface {
       ];
 
       if ($config->get('hotlink')) {
+        $relative_path = UrlHelper::encodePath($relative_path);
         $location = Url::fromUri("$server/$remote_file_dir/$relative_path", [
           'query' => $query_parameters,
           'absolute' => TRUE,