Emacs Error

$ systemctl --user status emacs.service                                                                         1 ↵
● emacs.service - Emacs: the extensible, self-documenting text editor
     Loaded: loaded (/nix/store/sxa6993l66iprb1q2pifmyja37qgwjd5-home-manager-files/.config/systemd/user/emacs.servic>
     Active: active (running) since Mon 2021-01-04 11:57:21 CET; 34min ago
       Docs: info:emacs
             man:emacs(1)
             https://gnu.org/software/emacs/
   Main PID: 2146 (.emacs-27.1-wra)
      Tasks: 3 (limit: 4915)
     Memory: 259.9M
        CPU: 3.230s
     CGroup: /user.slice/user-1000.slice/user@1000.service/app.slice/emacs.service
             ├─2146 /nix/store/ir3ny76qya01zmwpm1wlv9szxs5v2dqq-emacs-27.1/bin/emacs --fg-daemon
             └─2677 /home/davide/.nix-profile/bin/sqlite3 --batch --list --separator   --nullvalue nil --noheader --i>

Jan 04 11:57:21 NixOs bash[2146]: https://gitlab.gnome.org/GNOME/gtk/issues/221
Jan 04 11:57:21 NixOs bash[2146]: Emacs might crash when run in daemon mode and the X11 connection is unexpectedly lo>
Jan 04 11:57:21 NixOs bash[2146]: Using an Emacs configured with --with-x-toolkit=lucid does not have this problem.
Jan 04 11:57:21 NixOs bash[2146]: Loading /nix/store/ir3ny76qya01zmwpm1wlv9szxs5v2dqq-emacs-27.1/share/emacs/site-lis>
Jan 04 11:57:21 NixOs bash[2146]: Loading /nix/store/ir3ny76qya01zmwpm1wlv9szxs5v2dqq-emacs-27.1/share/emacs/site-lis>
Jan 04 11:57:22 NixOs bash[2146]: Key Chord mode on
Jan 04 11:57:22 NixOs bash[2146]: Starting Emacs daemon.
Jan 04 11:57:25 NixOs bash[2146]: Doom loaded 295 packages across 49 modules in 3.379s
Jan 04 12:28:43 NixOs bash[2146]: No protocol specified
Jan 04 12:30:23 NixOs bash[2146]: No protocol specified

$ emacsclient -c
Waiting for Emacs...
*ERROR*: Display :1 can’t be opened