Fatal error: Uncaught Error: Class 'craft\db\Migration' not found in /home/harmoniacare/public_html/vendor/ether/seo/src/migrations/m190114_152300_upgrade_to_new_data_format.php:20 Stack trace: #0 {main} thrown in /home/harmoniacare/public_html/vendor/ether/seo/src/migrations/m190114_152300_upgrade_to_new_data_format.php on line 20