"The requested URL /about/culture was not found on this server."

This is what I get after going through The PHP Practitioner lesson #17:

"The requested URL /about/culture was not found on this server."

What I do see: My home page shows up with the requested tasks displaying. But every time I click on a link that's not the home page, I get the above message. This happens with my code from following along with the lessons AND the source code with the switched credentials.

I couldn't get it to work after going through the lesson and even double and then triple checking my code. I went so far as to clone the source code from Github (from lesson #16 that includes the partials folder from #17?) and changed the connection credentials and it still ... no dice.

Note: This is also before Laravel is introduced.

Any sage knowledge and or advice would be immensely appreciated!