Fatal error: Uncaught Error: Class "TYPO3\CMS\Install\Controller\AbstractController" not found in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-install/Classes/Controller/IconController.php:31 Stack trace: #0 {main} thrown in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-install/Classes/Controller/IconController.php on line 31