Fatal error: Uncaught Error: Class "TYPO3\CMS\Install\Configuration\AbstractFeature" not found in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-install/Classes/Configuration/Mail/MailFeature.php:25 Stack trace: #0 {main} thrown in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-install/Classes/Configuration/Mail/MailFeature.php on line 25