Fatal error: Uncaught Error: Interface 'League\Config\MutableConfigurationInterface' not found in /mnt/volume_lon1_01/backend/adminseppi/vendor/league/config/src/ConfigurationBuilderInterface.php:19
Stack trace:
#0 {main}
thrown in /mnt/volume_lon1_01/backend/adminseppi/vendor/league/config/src/ConfigurationBuilderInterface.php on line 19