Fatal error: Uncaught Error: Class "Composer\Installers\BaseInstaller" not found in /home/itwerx/public_html/vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php:7
Stack trace:
#0 {main}
thrown in /home/itwerx/public_html/vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php on line 7