Issue #3341733 by Barry_Fisher, mandclu: LogicException: Render context is...

Issue #3341733 by Barry_Fisher, mandclu: LogicException: Render context is empty, because render() was called outside of a renderRoot() or renderPlain() call

modules/smart_date_recur/smart_date_recur.tokens.inc

@@ -127,7 +127,7 @@ function smart_date_recur_tokens($type, $tokens, array $data, array $options, Bu
         $rrules_processed[] = $rrid;
       }
       // @todo More structure or markup around mutiple values?
-      $output = \Drupal::service('renderer')->render($rule_text);
+      $output = \Drupal::service('renderer')->renderPlain($rule_text);
       $replacements[$original] = $output;
       continue;
     } // End rule_text token processing.
@@ -207,7 +207,7 @@ function smart_date_recur_tokens($type, $tokens, array $data, array $options, Bu
       }
     }
 
-    $output = \Drupal::service('renderer')->render($values);
+    $output = \Drupal::service('renderer')->renderPlain($values);
     $replacements[$original] = $output;
   }
   return $replacements;