Https://www.freecodecamp.org/learn/relational-database/learn-nano-by-building-a-castle/build-a-castle

[souf]

Virtual server doesn’t work ?

[ILM]

The Relational Database certification is in beta and is not stable.
When you have issues you can try to read and follow this post:

Running the Relational Database Curriculum in your Browser

The web based version of the Relational Database curriculum is here! Follow the steps below to run the courses in your browser. If you want to run them locally instead, you can learn how here. Note: you cannot earn your certification running these locally. How to get started Follow these steps to get started with the browser version of the courses: First, you will need to create a GitHub account if don’t have one If you don’t want to save your progress, you can skip to step 4 after you have…