Hi Brandon,
We created a small example of importing the csv file in the collection with values like "pankaj , 1", its importing fine in the collection. May be you are getting the error because of file structure is broke or other reson. Please try with small csv file and let us know.
I am attaching the csv file with values that we tested in importing.
Freemarker code: ${import_objects( file_id,"collection_name",",","true")}
If you are still facing the problem, kindly share the csv file that you are trying to importing.
Thanks,
Pankaj Kumar