My web host provider Pair Networks requires at least OpenSSH 9.0 for SFTP connections because of security problems with older versions. So far as I can tell the current Dreamweaver version 21.6 is still using OpenSSH 8.8 and therefore fails to connect. Published workarounds from Adobe only explain how to use even older versions of OpenSSH not newer ones (the current version is 10.6). This effectively makes Dreamweaver unusable for me so I suppose I shall have to end my trial and try some other editor..