json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[Ppang0405]

from telegraph import upload_file

Resource: https://python-telegraph.readthedocs.io/en/latest/_modules/telegraph/upload.html#upload_file

I use upload_file func but when I pass file_name or whatever file object (
by: with open(file_path, 'rb') as f:
list_src = upload_file(f)
), Error json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) throw.