Variable of mutation related issue

[dhruvmodhapp]

Hello Guys, need a help with the mutation.

Here mutation:

mutation insert_user_assessment( $objects:
[user_assessment_insert_input!]!) {
insert_user_assessment(objects: $objects) {
returning {
id
  }
 }
}

This above mutation. Passing correct objects value as argument and access token given. I am executing. But have this error : {"errors":[{"message":"Internal server error","extensions":{"code":"INTERNAL_SERVER_ERROR"}}]}

Anyone have a solution or idea for this?