I have installed ignition gazebo from https://bitbucket.org/ignitionrobotics/ign-gazebo/src/default/ I installed the ign-gazebo3 version it builds successfully but when i run it via "ign gazebo" i get that error ................................................................................................................................................................. [GUI] [Err] [Ogre2RenderEngine.cc:732] Unable to create the rendering window [GUI] [Err] [Ogre2RenderEngine.cc:732] Unable to create the rendering window [GUI] [Err] [Ogre2RenderEngine.cc:732] Unable to create the rendering window [GUI] [Err] [Ogre2RenderEngine.cc:739] Unable to create the rendering window
/usr/local/lib/ruby/ignition/cmdgazebo3.rb:320: [BUG] Segmentation fault at 0x00000000000002a8 ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux-gnu] .................................................................................................................................................................
I have tried version 3 & 2 (ign-gazebo2,ign-gazebo3) via source install and binary install all give the same error, not installation errors or build errors. just that error when i run it