Fatal error: Uncaught Error: Class "Maknz\Slack\Block" not found in /home/alterna/private_assets.alternalab.it/vendor/alek13/slack/src/Block/Header.php:7 Stack trace: #0 {main} thrown in /home/alterna/private_assets.alternalab.it/vendor/alek13/slack/src/Block/Header.php on line 7