The error message indicates that the schema you've defined in your queryDeffunction, i.e., "xxlmig:newValidation", does not exist in your Adobe Campaign (AC) database.
Here’s what you can do:
Validate that the schema name is correct, including the proper character case as defined in the schema definition.
If this is a newly created schema, ensure you publish it to your AC database by navigating to Tools > Advanced > Update database structure, and then re-execute the JavaScript activity.