RetroPie Error.. "unknown platform please manually set the __ platform variabl"

[bossplayer09]

Hi All, I installed RetroPie from berryboot over the air. When I go to setup menu to change configurations i get this message "Unknown platform - please manually set the __platform variable to one of the following: armv7-mali generic-x11 imx6 odroid-c1 rpi1 rpi2 x86." I browsed through the forums and tried the suggestions with no luck.. namely: sudo apt-get update ...Thanks in advance

[jonnykesh]

@bossplayer09 searching the phrase "unknown platform" on the forum search turns up this thread. https://retropie.org.uk/forum/topic/10260/unknown-platform-error Did you search the forum and try this solution?

[bossplayer09]

Retropie-Setup
git pull

I tried that but will try again... any other solutions would be helpful. thanks

[bossplayer09]

@jonnykesh I entered this code:
sudo __platform=rpi3 ~/RetroPie-Setup/retropie_setup.sh

and got the same error message.