Fatal error: Uncaught Error: Interface 'TYPO3\CMS\Backend\Toolbar\ClearCacheActionsHookInterface' not found in /home/.sites/884/site2951/web/test/luger/typo3conf/ext/dyncss/Classes/Hooks/Backend/Toolbar/ClearCacheActionsHook.php:16
Stack trace:
#0 {main}
  thrown in /home/.sites/884/site2951/web/test/luger/typo3conf/ext/dyncss/Classes/Hooks/Backend/Toolbar/ClearCacheActionsHook.php on line 16