Are you on the latest MacOS version? Any outstanding software updates? Is Chrome auto-updating or have you set it to manual? If manual, any outstanding updates?
It's not often these sorts of things happen spontaneously. They either stop working because a feature is deprecated in an old version of software, and you need to be up-to-date, or an update gets applied that breaks something and you need to roll back, or a change is made to a configuration either on purpose or by accident.
Even small things like adding an Ad Blocker extension will often break some sites completely, or parts of a site.