What is the equivalent of emacsclient -a ''
with emacs 27 on Ubuntu 18? I now get
$ emacsclient -a ''
emacsclient: file name or argument required
Try 'emacsclient --help' for more information
Without the fallback of starting an emacs daemon and then connecting again as had worked previously. This had worked on ubuntu 16.04 as well, so I assume it has something to do with Ubuntu 18.04.