Downloaded the MacOS application and gave it a go. Tried to add a connection to a remote FreeBSD server, using ssh key auth, and got an error: error connecting

Downloaded the MacOS application and gave it a go. Tried to add a connection to a remote FreeBSD server, using ssh key auth, and got an error: error connecting to remote: invalid packet received from mshell client: raw[Bad : modifier in $ '~'.] Also tried the default at setup 'sudo' for local, but the window to input the password wouldn't keep focus, so I could never input the password.