Upload error, I don't know why?

C:\Users\47013\Downloads>scp --host 107.173.**** --username root --password **** --target C:\Users\47013\Downloads\UartAssist.exe --source test
tar all files into C:\Users\47013\AppData\Local\Temp\127475259\jFLKXJCrOA.tar
tar: no files or directories specified
exit status 1

C:\Users\47013\Downloads>

Start with the reported scp-action invocation and the `tar: no files or directories specified` output. Inspect how the action handles the shown `--source test` and Windows paths, then reproduce the upload failure; done means the action either uploads the intended files or reports a clear input error.

Written by the indexing model from the issue text.