Graph visualization not working in Neo4j Browser

I'm new to Neo4j and just learning from the documentation after having gone through the getting started guides within Neo4j browser.

Here's a screenshot of the problem:

As you can see, the visualization is working one time and then is simply not available thereafter.
I did all of the getting started without visualizations.

Nevermind. I guess it depends on what the query is! :smiley: