Im trying to change the Logo of a ImageLabel on a GUI by chat command?

One change to the code I made is using a different variation of the for loop. Another problem I see in your code is you are trying to set "game.StarterGui.Scoreboard.Frame.AwayLogo" & "game.StarterGui.Scoreboard.Frame.HomeLogo". I would recommend using this instead

local Permitted = {"iSidersz", "Player"};
--local ALogo = game.StarterGui.Scoreboard.Frame.AwayLogo;
--local HLogo = game.StarterGui.Scoreboard.Frame.HomeLogo;

game.Players.PlayerAdded:connect(function(plr)
    for i = 1, #Permitted do
        if plr.Name:lower() == Permitted[i]:lower() then
            plr.Chatted:connect(function(msg)
                if msg:lower() == "away/orl" then
			for a,b in pairs(game.Players:GetChildren()) do
				b.PlayerGui.Scoreboard.Frame.AwayLogo.Image = script.Parent.orli.ID;
			end;
                end;
            end);
        end;
    end;
end);

This code will go through and take each and every player from "game.Players" and open their PlayerGui and find the scoreboard and change the value there instead of trying to change the one in StarterGui.