synaptic not run

[JOSE RAMON]

jose@jose-Z170X-Gaming-3:~$ synaptic
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Violación de segmento (`core' generado)

jose@jose-Z170X-Gaming-3:~$ sudo synaptic
[sudo] password for jose:
No protocol specified
Unable to init server: No se pudo conectar: Conexión rehusada

(synaptic:6616): Gtk-WARNING **: cannot open display: :0

jose@jose-Z170X-Gaming-3:~$

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: synaptic 0.84.2
ProcVersionSignature: Ubuntu 4.11.0-10.15-generic 4.11.8
Uname: Linux 4.11.0-10-generic x86_64
ApportVersion: 2.20.5-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Jul 18 23:57:16 2017
InstallationDate: Installed on 2017-07-18 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170717)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
SourcePackage: synaptic
UpgradeStatus: No upgrade log present (probably fresh install)