Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Utility\ExtensionManagementUtility" not found in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-sys-note/Configuration/TCA/Overrides/sys_reaction.php:3 Stack trace: #0 {main} thrown in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-sys-note/Configuration/TCA/Overrides/sys_reaction.php on line 3