API call comes out empty

I’m trying to implement a custom page to better serve my needs, I do a POST request to the bonita/loginservice as described here however if I try to do any sort of other calls (like one to system/session/unusedid) it always comes out as empty, am I missing something?

To better clarify what I have is a custom login page, I send the login data via post to bonita/loginservice with a redirect to another page and on that page I do a call to another api however the response comes as empty.

Any help is apreciated.

Disregard this, I’m not sure what was happening but this morning the problem no longer occurs