documentation links are broken. https://swagger.io/specification/

I'm finding it very hard to get started because even very simple examples in the swagger documentation, almost every time I try them time, throw multiple errors when used in the swagger editor. I guess I'm doing it wrong, but anyway, I'm trying to be a good citizen and resolve it myself by reading the documentation at https://swagger.io/specification/... but every link I click on is broken:

I've tried manually changing the link that it attempts to go to (e.g. to https://github.com/OAI/OpenAPI-Specification/blob/master/#operationObject) but that doesn't work either. Any assistance would be much appreciated.