Unable to upload file when working with Audio module.

I'm attempting to use the pageroute to create a complex profile.
One of the required elements is an mp3 file, but when I try to create the node in the pageroute, I get a "A file must be provided..." error.

I'm pretty sure this is a pageroute issue, since I can create audio nodes by themselves.
Currently using version 5.x-2.x-dev of the audio module.