Fatal error: Uncaught Error: Interface 'Drupal\variationcache\Cache\VariationCacheInterface' not found in /var/www/html/tmp/contrib/variationcache/src/Cache/VariationCache.php:17 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/variationcache/src/Cache/VariationCache.php on line 17