I tried and then WinSCP works fine. Thank you!

Your server might got updated and now requires ssh-rsa2:

Try upgrading to WinSCP 5.20 beta as it includes:
Issue 1952 – Support rsa-sha2-256 and rsa-sha2-512 SSH public key algorithms

Hi,
After Ubuntu server upgrade to 22.04 suddenly I can't connect to my Ubuntu server using WinScp. I receive the same message:

See attached log.
This is strange since using the same key I can connect to my machine using putty or Android JuiceSSH
I have added line using visudo.
What to do to restore WinScp access to my Ubuntu server?

I have launched two instances - a RHEL and a ubuntu instance (on AWS EC2), both using the same KeyPair.

1. Using Winscp, I am able to login to RHEL instance. Log attached.
2. However during login to ubuntu instance via WinScp, receiving the error "No supported authentication methods available (server sent: publickey)". Log attached.
3. Surprisingly, I am able to sftp to ubuntu instance via command prompt.

Attached are the success logs (of RHEL) and failure logs (via ubuntu)

Please post logs files from both with the same settings.

I'm using WinSCP SFTP Client to connect.
It's working fine with FileZilla but errors with WinSCP.