QueryDef operation from JSSP not functioning

Hello Folks,

Hope you're doing well

I have a strange and weird situation where I am doing a simple select operation using queryDef on a schema from JSSP. When I hit the JSSP in browser I am expecting the record details as response, however I am getting an empty collection even though data is present in DB. I tried other operations like count, getIfExists and get. When I tried get I got below error.

Same queryDef with any given operation works absolutely fine when executed from a JavaScript activity within workflow. I am not able to understand where it is going wrong. With your expertise, please help on how can we resolve this.

Thanks,

SSB