Workaround for twigphp/Twig#4701

Author: brandonkelly

src/helpers/Template.php

@@ -12,6 +12,7 @@
 use craft\db\Paginator;
 use craft\web\twig\variables\Paginate;
 use craft\web\View;
+use Stringable;
 use Twig\Environment;
 use Twig\Error\RuntimeError;
 use Twig\Extension\CoreExtension;
@@ -145,6 +146,11 @@ public static function attribute(
         }
 
         try {
+            // workaround for https://github.com/twigphp/Twig/issues/4701
+            if ($type !== TwigTemplate::METHOD_CALL && $item instanceof Stringable) {
+                $item = (string) $item;
+            }
+
             return CoreExtension::getAttribute(
                 $env,
                 $source,