Fatal error: Uncaught Error: Class "craft\migrations\BaseFieldMergeMigration" not found in /home/pivotdes/dev.pivot.design/migrations/m260512_130928_merge_heading3_into_subtitle.php:11 Stack trace: #0 {main} thrown in /home/pivotdes/dev.pivot.design/migrations/m260512_130928_merge_heading3_into_subtitle.php on line 11