I don’t do anything to obtain Box2d. In 3.13.1, all I had to do was type:
And I could use Box2d without any problem. Between 3.13.1 and 3.17, something has changed in how Box2d is included with cocos2d, so this is no longer possible.
I think when something like this is changed, documentation should be added in the gift book, so it’s easy to figure out how to do things like this.