Hello @ChrisSaillant!
I've been replicating this flow for the past days and managed to find the proper configuration! When you are configuring the Upload file from URL step, make sure to select the Report URL pointing to the file (you'll see a hint text right below).
I would also recommend using the name of the report as the value for Destination File Path since this is the name OneDrive will use to save the file and it will include its extension (.docx or .pdf). Afterwards, you can use a Move or rename a file step to transfer the uploaded file to the desired folder.
Here is a quick demonstration of my flow.
Let me know if it works for you!
😄