gazebo11 with black screen (no objects in scene)

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Hi,

I installed gazebo on a Ubuntu 20.04 system via command :

curl -SSL http:://get.gazebosim.org | sh

Then I opened gazebo and created a new world ($HOME/test.sdf).
I saved the world in my home directory
I quite gazebo
Then I start gazebo with the new created model: "gazebo ./test.sdf --verbose"
Result in start of gazebo but the model is not visible in the scene (black window).
There is no strange logging visible in the terminal (verbose output)

How to solve this ? Did I missed something ?

Best regards,
Jurge

In the left panel I see the models I added to the world.