Wersja PHP: 7.3.9
też masz takie coś:
Brakujące pliki (6)
vendor/composer/installers/src/Composer/Installers/SyliusInstaller.php
vendor/composer/installers/src/Composer/Installers/KnownInstaller.php
vendor/composer/installers/src/Composer/Installers/TaoInstaller.php
vendor/composer/installers/src/Composer/Installers/Redaxo5Installer.php
vendor/composer/installers/src/Composer/Installers/DframeInstaller.php
vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php