Fatal error: Uncaught Error: Class 'Drupal\Core\Theme\ThemeNegotiator' not found in /var/www/html/tmp/contrib/devel/webprofiler/src/Theme/ThemeNegotiatorWrapper.php:11 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/devel/webprofiler/src/Theme/ThemeNegotiatorWrapper.php on line 11