404 Not Found Error while adding files to a project

Hi! I’m using your python client to access api. When I’m trying to add_file of source language, I’m getting 404 Not Found error. As I double-checked, my projectId and storageId is definitely correct. What can be the reason?

Hi there!
As I can see the project is string-based, please try the following endpoint to add files for the string-based projects: