Fatal error: Uncaught Error: Class "yii\helpers\Json" not found in /home/telefonai/public_html/test.telefonai.eu/templates/__MACOSX/vendor/nystudio107/craft-seomatic/src/helpers/Json.php:21 Stack trace: #0 {main} thrown in /home/telefonai/public_html/test.telefonai.eu/templates/__MACOSX/vendor/nystudio107/craft-seomatic/src/helpers/Json.php on line 21