Download a file using the api

Hi, we have a problem to download from a file using the api.

At first we used method files/list_folder, and it works. But after we tried to download file from existing path by id:

https://content.dropboxapi.com/2/files/download

Response with error:

 {"error_summary": "path/not_found/..", "error": {".tag": "path", "path": {".tag": "not_found"}}} 

How it possible that method files/list_folder returns a path and id of files, but  files/download has an error.

We are using Dropbox Business Advanced.

 

Thank you for response.