I just tried to invoke the API Service and seems like everything works well, I receive error: “400 - Invalid Access Token” which is by design I assume.
Are you still experiencing this problem? Perhaps it depends of input parameters, could you please provide us the correct/test input parameters to reproduce the problem?
Anyways, there is an internal ticket (BKNDLSS-22264) to investigate the issue by logs.
Yes please try invoke with Postman, because it seems to work when invoking within Backendless but it doesnt work when you invoke outside of Backendless. Its a vey wierd error. Please help