when I try to run this command ign gazebo shapes.sdf -v 4
I got a blank window. I tried to run a world which uses Ogre1 ign gazebo -v 3 lights.sdf
but the same blank window. I also tried to use the Acropolis but the same issue
this is the output from the terminal when running lights.sdf

[Msg] Ignition Gazebo GUI    v2.16.0
[Msg] Ignition Gazebo Server v2.16.0
[Msg] Loading SDF world file[/usr/share/ignition/ignition-gazebo2/worlds/lights.sdf].
[Msg] Create service on [/world/lights/create]
[Msg] Remove service on [/world/lights/remove]
[Msg] Pose service on [/world/lights/set_pose]
[Msg] Loaded level [3]
[Msg] Serving world controls on [/world/lights/control] and [/world/lights/playback/control]
[Msg] Serving GUI information on [/world/lights/gui/info]
[Msg] World [lights] initialized with [1ms] physics profile.
[Msg] Found no publishers on /stats, adding root stats topic
[Msg] Found no publishers on /clock, adding root clock topic
[Msg] Serving scene information on [/world/lights/scene/info]
[Msg] Serving graph information on [/world/lights/scene/graph]
[Msg] Serving full state on [/world/lights/state]
[Msg] Publishing scene information on [/world/lights/scene/info]
[Msg] Publishing entity deletions on [/world/lights/scene/deletion]
[Msg] Publishing state changes on [/world/lights/state]
[Msg] Publishing pose messages on [/world/lights/pose/info]
[Msg] Publishing dynamic pose messages on [/world/lights/dynamic_pose/info]

when running the shapes.sdf I got similar output adding the same output except this line is added

[GUI] [Dbg] [ign.cc:359] GUI requesting list of world names. The server may be busy downloading resources.     Please be patient.

OS: Ubuntu 18.04
Ignition: Blueprint
OpenGL version string: 4.6.0 NVIDIA 390.116