This issue occurs consistently when attempting to upload a WordPress theme (many small files). Uploads start but fail after a short while. Using FileZilla with the same FTP account works without issue ...

./git-ftp: line 18: $'\r': command not found ./git-ftp: line 22: $'\r': command not found ./git-ftp: line 28: $'\r': command not found ': not a valid identifierre ...