Pipeline error: Import with CSV - HTTP status code 404

New to the forum.  I searched but did not find anything existing for this specific error so here is my first post.

I am trying to run a pipeline that takes a .csv file from a document table and creates new records in a second table from each entry in the .csv file.

I am using Quickbase Channel->Bulk Record Sets->Import with CSV

When I run the pipeline, I get the following error:

Obviously this is a URL error but I don't understand why since the file/URL resides within the same app as this pipeline. 

Any help will be sincerely appreciated.

v/r...Aaron