An error of isaac gym (XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":1")

Autonomous Machines Robotics - Isaac Isaac Gym
1

when i run the isaac gym preview4 version’s RL example, an error occured and i can not solve it. The problem list as following:
XIO: fatal IO error 11 (Resource temporarily unavailable) on X server “:1”
after 193 requests (193 known processed) with 1 events remaining.

my ststem: Ubuntu 20.04
Nvidia driver version:470.86

0c4cdf31-9809-4169-9b8e-4fd18b1aba04
0c4cdf31-9809-4169-9b8e-4fd18b1aba041305×515 57.6 KB

2

I thought the bug might something about the GUI, because when i add the parameter, headless= True. the train could be continue, but i can not see the GUI.

it would be so grateful if anyone can help me!!!

thanks! :)