Issue on Colab: "Failed to connect Can't connect to display"

[yding25]

When I run AI2-THOR on Colab, I had such an issue. How to solve it?

The following builds were found, but had missing dependencies. Only one valid platform is required to run AI2-THOR.
Platform Linux64 failed validation with the following errors: Invalid display: :1. Failed to connect Can't connect to display ":1": [Errno 111] Connection refused 
  Linux64 requires a X11 server to be running with GLX. If you have a NVIDIA GPU, please run: sudo ai2thor-xorg start