Fatal error: Uncaught Error: Interface "League\Config\MutableConfigurationInterface" not found in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/league/config/src/ConfigurationBuilderInterface.php:19
Stack trace:
#0 {main}
  thrown in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/league/config/src/ConfigurationBuilderInterface.php on line 19