Calling circulation/rules/request-policy with invalid loan_type_id or location_id returns 500 error

Overview:
This issue is observed in an Iris HF1 environment (mod-circulation-20.1.6) and can be reproduced on bugfest (mod-circulation-20.1.7)
Response from circulation/rules/request-policy with invalid ids returns a 500 error instead of 422

Steps to Reproduce:
Issue GET request with either loan_type_id or location_id that does not exist in environment
`GET https://okapi-bugfest-iris.folio.ebsco.com/circulation/rules/request-policy?item_type_id=1a54b431-2e4f-452d-9cae-9cee66c9a892&loan_type_id=2b94c631-fca9-4892-a730-03ee529ffe27&patron_type_id=3684a786-6671-4268-8ed0-9db82ebca60b&location_id=509e4237-bae6-4cfe-aab9-ce3bbe8b8440`

https://s3.amazonaws.com/foliodocs/api/mod-circulation/p/circulation-rules.html#circulation_rules_request_policy_get

Expected Results:
Per api would have. expected to receive
Response 422
Invalid id error.
Actual Results:
Instead receive 500 response
Interested parties:

Note
I assigned to Prokopovych based on
https://wiki.folio.org/display/REL/Team+vs+module+responsibility+matrix