I have the with-editor package, but: a) it's up-to-date b) removing it from
the configuration did not solve the problem, c) running emacsclient from
outside of Emacs gives the same error. :(

Noam Postavsky <npostavs@gmail.com> ezt írta (időpont: 2020. okt. 11., V,
14:24):

> Lars Ingebrigtsen <larsi@gnus.org> writes:
>
> > Gábor <hajovonta@gmail.com> writes:
> >
> >> When issuing 'emacsclient README' command in a terminal (Emacs is
> >> running and server is started), I get the following:
> >>
> >> Waiting for Emacs...
> >> *ERROR*: Wrong number of arguments: (1 . 4), 5
> >
> > Do you use the with-emacs package?  If so, you probably have to upgrade
> > it in Emacs 28.
>
> s/with-emacs/with-editor/
>