SFTP connection to IONOS Linux Server (as Target)

Thanks for the plugin – good work.
But I have a problem: I am trying to upload a file to a Linux server at the provider IONOS via SFTP. The data for URL, port, username and password are correct – I use the same data for Cyberduck.

Nevertheless, the plugin tells me this error:

1. try to send backup file to an FTP server …
   [05-Jul-2024 10:06:44] ERROR: Cannot connect to FTP server: xxxxxxx.webspace-data.io:22
   [05-Jul-2024 10:06:44] Restart after 33 seconds.

I have set the xxxxxx for data protection reasons, but the correct URL is known and set.

I have with and without the check mark at ” Use explicit SSL FTP connection.” tried. I even tried checking the “IIS server bug” box. I always get the message above.

Could it be that the plugin does not support SFTP?

Thank you and best regards,

Günther