Graph algorithm playground doesn't work

I installed "Graph algorithm playground" in Neo4j Desktop but but its doesn't working, What may cause this kind of problem?
Thank you for your time.

What data set are you using? And what kind of algorithms are you trying to run? That information would help.

Please put more information about your problems, maybe screenshot.

Thanks for the answers, I have a connection problem

Can you share a screenshot or such?

Did you have a look at this blog post: