Drupal String not found

[lucmerceron]

PHP Fatal error: Class 'Drupal\\Component\\Utility\\String' not found in /sites/drupal8/modules/token/token.tokens.inc on line 103

https://www.drupal.org/node/2488054

[kurtisdunn]

Replace calls to \Drupal\Component\Utility\String with \Drupal\Component\Utility\SafeMarkup