Website with documentation works not stable

I have problem during visiting website https://babeljs.io/docs/en/
There is a error saying that browser cannot load this page. I faced with this by diffrent devices.

Start by opening https://babeljs.io/docs/en/ and reproduce the browser loading error on more than one device, as reported. Trace the website's documented entry point and deployment behavior, then consider the issue done when the documentation page loads reliably across the affected devices.

Written by the indexing model from the issue text.