Some Docker scenarios are not working

[sergioagm]

I'm trying the course "Learn Docker, Container Runtimes, Builders and Registries using Interactive Browser-Based Scenarios" and the first two scenarios aren't working for me.

• https://www.katacoda.com/courses/container-runtimes/what-is-a-container
• https://www.katacoda.com/courses/container-runtimes/what-is-a-container-image

I get the following error: This environment is no longer available.

Tried with Firefox 99.0 and Chrome 100.0.4896.75, both without ad blockers.