I installed grav this morning and the home page shows up correctly but I tried to create a second page using the instructions on the home page and the page appears on the home page menu but when I click on it I get an error.

In the browser, I see: Not Found The requested URL /mypage was not found on this server.

In the apache logs, I see: File does not exist: /var/www/html/grav/mypage, referer: http://grav.talalg.com/

Here are the steps I took to create the file:

[amead@talalg grav]$ mkdir user/pages/02.mypage/
[amead@talalg grav]$ vi user/pages/02.mypage/default.md
[amead@talalg grav]$ ls -l user/pages
total 8
drwsrwsr-x 2 amead apache 4096 Feb 5 23:02 01.home
drwxrwsr-x 2 amead apache 4096 Feb 6 14:31 02.mypage
[amead@talalg grav]$ ls -l user/pages/02.mypage/
total 4
-rw-rw-r-- 1 amead apache 124 Feb 6 14:31 default.md
[amead@talalg grav]$ cat user/pages/02.mypage/default.md

title: My New Page

My New Page!

99% chance it's an Apache configuration issue:

The first thing I would check is the Grav Apache requirements.

Next step after that is to look at the Not Found Trouble Shooting section.