I know this is possibly a bit off-topic, but I had this same error message and the problem turned out to be my server. OpenSSH was set up correctly, but /dev/null had the wrong permissions (700 instead of 666) which was stopping SFTP from functioning.
Just thought I'd leave this here in case anyone else is Googling a similar problem. :) -- "Error: ssh program unexpectedly exited" when trying to browse files on router https://bugs.launchpad.net/bugs/424648 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
