Fatal error: Class 'Drupal\Component\Utility\String' not found in /var/www/drupal/themes/barnettechetJLB/barnettechetJLB.theme on line 150
because Drupal\Component\Utility\String is deprecated. So line 8 should now contain Drupal\Component\Utility\SafeMarkup and line 150 should contain SafeMarkup::checkPlain
Fatal error: Class 'Drupal\Component\Utility\String' not found in /var/www/drupal/themes/barnettechetJLB/barnettechetJLB.theme on line 150
because
Drupal\Component\Utility\String
is deprecated. So line 8 should now containDrupal\Component\Utility\SafeMarkup
and line 150 should containSafeMarkup::checkPlain