Fatal error: Uncaught Error: Class 'Composer\Installer\LibraryInstaller' not found in /var/www/html/cake3-migration/vendor/cakephp/plugin-installer/src/Installer/PluginInstaller.php:12
Stack trace:
#0 {main}
  thrown in /var/www/html/cake3-migration/vendor/cakephp/plugin-installer/src/Installer/PluginInstaller.php on line 12