Marlin 1.1.9 Firmware Issues

Hello!

I have recently flashed Marlin 1.1.9 to my Anet A6 motherboard. The printer restarted and everything looked like it was going smoothly. However, when I tried to interact with the settings (start prints, change temp., look at SD card files, etc.), I was brought back to the main screen. I was only able to change the % of the FR (?) on the main screen. The main screen has "3D Printer Ready." at the bottom, so I don't know what the issue is. Do I not have the correct A6 settings? I downloaded the A6 configuration files and only changed the type of display in them. I have the u8glib library. What's the issue? Thanks a million for the help!