Imagej_server use for a new user

I am very new to this software. I am trying to use imagej_server. The code is running and accepting rest commands on 8080. I am using the postman commands supplied to understand the api. They all run except the script eval. I had hoped to write a small script to accomplish my task. This may be a simple issue that I am not using an input.

I am using the command that came with the examples. It is a python example.