Using Query filters on Orders

Summary:

In Postman I am trying to test out some query filters on the Get Orders. However, what ever I try it seems to no like the syntax. I have read and followed this article: https://docs.oracle.com/en/cloud/saas/cx-commerce/21d/cxocc/RESTQueryParams.html

Content (required):

ccadmin/v1/orders?q=items.state ne "SUBMITTED"

or

ccadmin/v1/orders?q=state ne "SUBMITTED"

Keep getting error similar to:

{

    "errorCode": "00000000",

    "message": "The value \"items.state ne \"SUBMITTED\"\" for parameter \"q\" is invalid",

    "status": "500"

}

Version (include the version you are using, if applicable):

23A