( ! ) Fatal error: Class 'Composer\Installers\BaseInstaller' not found in /var/www/clients/client0/web4/web/vendor/composer/installers/src/Composer/Installers/TYPO3FlowInstaller.php on line 7
Call Stack
#	Time	Memory	Function	Location
1	0.0000	361216	{main}( )	.../TYPO3FlowInstaller.php:0