Fatal error: Uncaught Error: Class 'yii\base\Behavior' not found in /home/luxurytr/public_html/lt8/vendor/craftcms/cms/src/behaviors/FieldLayoutBehavior.php:22 Stack trace: #0 {main} thrown in /home/luxurytr/public_html/lt8/vendor/craftcms/cms/src/behaviors/FieldLayoutBehavior.php on line 22