Fatal error: Uncaught Error: Class 'Cake\Routing\Router' not found in /var/www/html/cake3-migration/vendor/cakephp/cakephp/config/bootstrap.php:26
Stack trace:
#0 /var/www/html/cake3-migration/config/bootstrap.php(30): require()
#1 {main}
  thrown in /var/www/html/cake3-migration/vendor/cakephp/cakephp/config/bootstrap.php on line 26