Warning: Class Drupal\Core\Extension\Extension has no unserializer in Drupal\Core\Cache\DatabaseBackend->prepareItem() (line 167 of core/lib/Drupal/Core/Cache/DatabaseBackend.php).
Warning: Class Drupal\Core\Extension\Extension has no unserializer in Drupal\Core\Cache\DatabaseBackend->prepareItem() (line 167 of core/lib/Drupal/Core/Cache/DatabaseBackend.php).
My site upgraded to Drupal 8
Upgrading to Drupal 8 from Drupal 7 - done it in 2 hours, not so hard thing. I need to make additional changes, to return some functionality, that was disabled due to unsupporting Drupal 7 things...
