FTP
550 File Unavailable
Requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
当您看到此代码时
When you try to download, delete, or navigate to a file or directory that does not exist or is restricted by server permissions.
如何修复
Verify the file path and name are correct (FTP paths are case-sensitive on most servers). Check your user permissions with the server administrator.