Fatal error: Uncaught Error: Class "Composer\Installers\BaseInstaller" not found in C:\Apache24\htdocs\cms_upgrade\vendor\drupal\console-extend-plugin\src\DrupalConsoleInstaller.php:11
Stack trace:
#0 {main}
thrown in C:\Apache24\htdocs\cms_upgrade\vendor\drupal\console-extend-plugin\src\DrupalConsoleInstaller.php on line 11