Fatal error: Uncaught Error: Class 'craft\gql\base\Mutation' not found in /home/mpolsk5/public_html/seocomo/craft/vendor/craftcms/cms/src/gql/mutations/Ping.php:19
Stack trace:
#0 {main}
thrown in /home/mpolsk5/public_html/seocomo/craft/vendor/craftcms/cms/src/gql/mutations/Ping.php on line 19