E117: Unknown function: dirvish#open

[tambourine-man]

Hi, opening a remote SSH server displays:

Error detected while processing function <SNR>21_PrepD[17]..dirvish#open[39]..<SNR>27_open_dir[18]..BufEnter Autocommands for "*"..function <SNR>21_PrepD: line 18: E131: Cannot delete function dirvish#open: It is in use

Eventually, it lists the remote directory, but everything throws this error:
E117: Unknown function: dirvish#open

[rwmitchell]

Having the same issue, except it never loads. If I change 'ssh' to 'scp' and use 'gf', netrw opens the remote file.

This is obviously basic functionality that isn't working, so the cause must be on my end.

mvim ssh://HOST/
opens a blank page, but '-' opens a list of files on the remote host, each preceded with ssh://HOST/ so it is sorta working.