How can I use a data file to associate multiple courses in Canvas to a Blueprint course?

I am trying to use Runner to link to a csv file that has multiple course codes to associate into a Blueprint course. My API call works fine when I run it alone in the regular Postman workspace, but when I go to Runner & link to a a csv file of a list of all the course ID’s only gives me errors saying “This request does not have any tests”. In my csv file, I have a column header of course_ids_to_add which matches the variable in the call line, and then the column just contains the course ids. I’ve not done this type of thing before and don’t want to have to run a separate call for every single course as there are hundreds of them!