Failure when adding roms Retroarch/emulation station

[Jorgejohnson72]

trying to add my roms to my pi4 and i get this notice when i go to the file manager and click on the rom im trying to add i get this error any help to whats going on?

[mitu]

You're trying to open a .7z archive from MC, but you don't have the 7Zip utilities installed - as the error message tells you. Install p7zip with apt and you'll probably be able to get rid of this message.

[Jorgejohnson72]

@mitu sorry if i seem helpless but how do i download p7zip with apt?

[mitu]

@jorgejohnson72 You can exit EmulationStation (from the Quit menu) and run, from the command line:

sudo apt install p7zip

Go back to EmulationStation by typing emulationstation.