I have the same authentication method set up on readyAPI
I first get the token
using property transfer I add it as a property to the project level
In the test step that requires this cookie I add a header
the header is pointing to the project level property 'token' that I have created and populated using the property transfer above
It is working for me.
Use property transfer instead of 'get data' I find it more reliable
Make sure your cookie is transfered correctly - compare your raw data between readyAPI and postman to see the differences and adjust until you make it work
Good luck.
