Isaac Gym problem

After I finished installing isaacgym and ran the python program in examples, the terminal displayed the following: isaacgym interface black screen, not displaying anything

~/isaacgym/python/examples$ python 1080_balls_of_solitude.py
Importing module ‘gym_38’ (/home/gy/isaacgym/python/isaacgym/_bindings/linux-x86_64/gym_38.so)
Setting GYM_USD_PLUG_INFO_PATH to /home/gy/isaacgym/python/isaacgym/_bindings/linux-x86_64/usd/plugInfo.json
WARNING: Forcing CPU pipeline.
Not connected to PVD
+++ Using GPU PhysX
Physics Engine: PhysX
Physics Device: cuda:0
GPU Pipeline: disabled

I met the same problem
have you solved this promblem?