drupal core updaten

ik probeer via drush in terminal op mac drupal te updaten maar krijg steeds deze melding

Fatal error: Class 'Drupal\Core\Session\AccountInterface' not found in /Users/kareldayer/downloads/core/core/includes/bootstrap.inc on line 65
Drush command terminated abnormally due to an unrecoverable error. [error]
Error: Class 'Drupal\Core\Session\AccountInterface' not found in
/Users/kareldayer/downloads/core/core/includes/bootstrap.inc, line 65
MacBook-Pro-van-Karel:core kareldayer$ drush cr

Fatal error: Class 'Drupal\Core\Session\AccountInterface' not found in /Users/kareldayer/downloads/core/core/includes/bootstrap.inc on line 65
Drush command terminated abnormally due to an unrecoverable error. [error]
Error: Class 'Drupal\Core\Session\AccountInterface' not found in
/Users/kareldayer/downloads/core/core/includes/bootstrap.inc, line 65
MacBook-Pro-van-Karel:core kareldayer$