Fatal error: Uncaught Error: Class 'Composer\Package\BasePackage' not found in /home/clienti2020/public_html/novaballet.it/vendor/composer/composer/src/Composer/Package/AliasPackage.php:21 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/composer/composer/src/Composer/Package/AliasPackage.php on line 21