Fatal error: Uncaught Error: Class "yii\db\Connection" not found in /home/telefonai/public_html/test.telefonai.eu/vendor/craftcms/cms/src/db/Connection.php:43 Stack trace: #0 {main} thrown in /home/telefonai/public_html/test.telefonai.eu/vendor/craftcms/cms/src/db/Connection.php on line 43