Fatal error: Uncaught Error: Class 'TYPO3Fluid\Fluid\Core\Variables\StandardVariableProvider' not found in /var/www/typo3/vendor/typo3fluid/fluid/src/Core/Variables/JSONVariableProvider.php:16 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/typo3fluid/fluid/src/Core/Variables/JSONVariableProvider.php on line 16