Fatal error: Uncaught Error: Class "League\Config\Exception\InvalidConfigurationException" not found in /Applications/MAMP/htdocs/fislo/vendor/league/config/src/Exception/ValidationException.php:18 Stack trace: #0 {main} thrown in /Applications/MAMP/htdocs/fislo/vendor/league/config/src/Exception/ValidationException.php on line 18