Retropie Not Booting From Terminal

[user1252574]

I have followed the docs to manually install retropie on my Raspberry Pi 3B, but it won't launch when I type "emulationstation" into terminal.

I get this error:

Oct 16 14:11:20 lvl0: 	Error creating SDL window!
	Could not get EGL display
Oct 16 14:11:20 lvl0: 	Renderer failed to initialize!
Oct 16 14:11:20 lvl0: 	Window failed to initialize!

Pi Model or other hardware: Pi 3B
Power Supply used: A samsung phone charger
RetroPie Version Used: 4.17.9
Built From: Raspberry Pi OS (With desktop)
USB Devices connected: HP Wired Mouse (X900) and Dell Wired Keyboard (KB1412)
Controller used: XBOX 360 Wired USB
Error messages received:

Oct 16 14:11:20 lvl0: 	Error creating SDL window!
	Could not get EGL display
Oct 16 14:11:20 lvl0: 	Renderer failed to initialize!
Oct 16 14:11:20 lvl0: 	Window failed to initialize!

Verbose log (if relevant):
Guide used: https://retropie.org.uk/docs/Manual-Installation/
File: Don't know
Emulator:
Attachment of config files: ?
How to replicate the problem: I'm just attempting to launch it from terminal (using the command "emulationstation")

Please help

[BuZz]

@user1252574 You need to exit the desktop environment - RetroPie is not designed to be run from the Desktop on the RPI.

[user1252574]

@buzz Thanks.