Fatal error: Uncaught Error: Class 'Composer\DependencyResolver\Operation\SolverOperation' not found in /home/clienti2020/public_html/novaballet.it/vendor/composer/composer/src/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php:23 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/composer/composer/src/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php on line 23