Yes, Alex said it's 150, but different on my end when I tried and it's 550. I can't create, rename, edit, or delete files and folder. And that's something not related to FTP client, but host restrictions.
I tried again and still the same, when I tried the SFTP, it said that it's not supported
Error: Disconnected: No supported authentication methods available (server sent: publickey)
Error: Could not connect to server
Instead of FTP, maybe you can provide the login credentials of your hosting? Maybe we could use its file manager.