Fixes issue where client-side 404s were getting swallowed
Fixes issue where client-side 404s were getting swallowed

If route can't be found, no `page` class is set, and we were
throwing an error about `page` being undefined instead of logging
the 404.

emecell/react-server,doug-wade/react-server,lidawang/react-server,szhou8813/react-server,davidalber/react-server,lidawang/react-server,szhou8813/react-server,doug-wade/react-server,redfin/react-server,davidalber/react-server,emecell/react-server,redfin/react-server