No supported authentication methods available in FileZilla

The error means that FileZilla tried all available authentication methods and have not succeeded. In your case, there was only public key authentication method available (a method that the client [FileZilla] and the server agreed on mutually).

As you claim that you have set up FileZilla correctly, chances are that you have not configured the public key on server-side.

For instructions see:

• https://winscp.net/eng/docs/guide_public_key or
• https://www.howtoforge.com/how-to-configure-ssh-keys-authentication-with-putty-and-linux-server-in-5-quick-steps and
• Disconnected: no supported authentication methods available

Though actually all the guides expect that you have a way to connect (e.g. password authentication). What does not seem to be the case. Possibly your server administrator/hosting provider has its own mechanism for setting up the public key authentication.

If you specify, what is your server like, you may get more specific answers.

I had similar issue error was Error: Disconnected: No supported authentication methods available (server sent: publickey)

Ans: Simply go to filezilla-Edit-settings-sftp-Add key file--add your ppk file-ok

connect again and issue resolved

Diff answer than 5 other answers here above (as of this moment)

I received this authentication error- No supported authentication methods available (server sent: publickey) repeatedly while connecting to my google cloud project and connecting thru FileZilla, even when I had spent hours checking my every step again and again by watching diff youtube videos and reading articles over Digital Ocean and similar.

But finally succeeded in a second, when I went into GCloud> Desired Project> Compute Engine> Metadata (in the left bar)> Metadata (in the main Pane)> and there I changed ' enable-oslogin' from 'True' to 'False'.

I had, sometime in my overzeal, had put in this key yesterday while doing something else.