Process Instance Variable API Not working in postman giving 403 Code

I am trying to access Flowable 7.0.1 Engine REST API following Flowable Process Swagger Documentation
URL : https://:/runtime/process-instances/{processInstanceId}/variables
Params & body : as per documentation.

Kindly help.

P.S. => We have already tried changing & giving different HTTP methods allowed.

Hey,
403 indicates that the credentials you are using are valid, but lack the proper rights to access the URL.

Can you try it out with an admin user?

Greetings

Christopher