> > > > I had to create a 'config' file within '.ssh' directory to support my > > > > rsa key (too old format ?). Instructions according to > > > > https://stackoverflow.com/questions/35233777/git-error-unable-to-negotiate-with-xx-xx-xxx-xxx-no-matching-host-key-type-fo But perhaps I misunderstood. If your question is why authentication is falling back to username/password See my answer at SO https://stackoverflow.com/a/70434510 for a similar issue with Git/AzureDevOps server. TLDR: Git for Windows 2.3something updated OpenSSH to 8.something This changed default behavior of which SSH encryption algorithms deemed cryptographically safe. Not all services allow more sophisticated keys, in which case you may override to OpenSSH defaults
