This issue appears to have surfaced after the Roblox outage earlier today however given that https://status.roblox.com specifies that everything is ‘operational’, I’m assuming that the outage has passed and this is either something that was overlooked or something that the team is aware of and investigating separately of the outage.
Navigating to most swagger docs pages on the website (such as https://games.roblox.com/docs) results in a 404 page. This 404 page is different from the 404 page you get if you go to an endpoint that doesn’t exist, which implies some error or bug of some form. The endpoints on these subdomains appear to still work. However, the lack of documentation makes it difficult to use them in their intended way, if not already using them.
The documentation also appears to be 404’ing in its json format (https://games.roblox.com/docs/json/v1), which is possibly a cause for why the docs page is broken. It’s worth being aware that not all swagger docs pages are affected. For example, https://chatmoderation.roblox.com/docs is available, including its json formatted documentation, albeit that subdomain doesn’t really have any documented endpoints for developers to use.
Please rely on this new documentation page instead of the old documentation URLs since we cannot offer guarantees that the old URLs will stay available, including any variation (like the double slash workaround), for involved technical reasons.
While we do our best to 
We are looking into improvements to the new documentation pages, like having a way to download the openAPI JSON for each surface, and we are investigating what it would take to support “try out”-esque features on this page.