Handle ftp server with vs code command

Has anyone here worked with FTP server remote control? I'm currently fixing additional requirements for a production server project using an FTP host, username, and password.

I connected to the remote server (ftp qr.misl.com.mm) and downloaded all the folders. They appear in VS Code, except for the folders inside the public directory, which only show as [DIR] js, [DIR] design, etc.

I’m using the following FTP commands:

ftp qr.misl.com.mm

[Entered username and password successfully]

ftp> cd public/design/img

250 OK. Current directory is /public/design/img

ftp> put "C:\Users\User\Downloads\background-image.jpg"

200 PORT command successful

425 Could not open data connection to port 24556: Connection refused

I encountered the error 425 Could not open data connection to port 24556: Connection refused. I know this is usually fixable via cPanel, but I don’t have access to cPanel. My senior only provided the FTP host, username, password, and remote path.

I just need to upload a background image to the public/design/img folder to update the login page. How can I solve this problem? Any advice would be greatly appreciated!