Help

[myonlake]

Perhaps look at your own script before asking for help for every single thing you need.

Client-side

addEvent("onClientPlayerSerialFetched", true) 
addEventHandler("onClientPlayerSerialFetched", root, 
    function(serial) 
       guiSetText(aSerial, "Serial: " .. serial) 
    end 
) 
  
addEventHandler("onClientGUIClick", aGrid, 
    function() 
    local pRow = guiGridListGetSelectedItem(aGrid) 
        if (pRow and pRow ~= -1) then 
            triggerServerEvent("onClientPlayerSerialRequested", localPlayer, guiGridListGetItemText(aGrid, pRow, 1)) 
        end 
    end 
) 

Server-side

function findPlayer(name, player) 
    if name == "*" and getElementType(player) == "player" and not isGuestAccount(getPlayerAccount(player)) then 
        return player 
    else 
        local matches = {} 
        for i,v in ipairs(getElementsByType("player")) do 
            if getPlayerName(v) == name and not isGuestAccount(getPlayerAccount(v)) then 
                return v 
            end 
            local playerName = getPlayerName(v):gsub("#%x%x%x%x%x%x", "") 
            playerName = playerName:lower() 
            if playerName:find(name:lower(), 0) and not isGuestAccount(getPlayerAccount(v)) then 
                table.insert(matches, v) 
            end 
        end 
        if #matches == 1 then 
            return matches[1] 
        end 
        return false 
    end 
end 
  
addEvent("onClientPlayerSerialRequested", true) 
addEventHandler("onClientPlayerSerialRequested", root, 
    function(player) 
        local target = findPlayer(player, source) 
        if target then 
            triggerClientEvent(source, "onClientPlayerSerialFetched", source, getPlayerSerial(getPlayerFromName(target))) 
        else 
            outputChatBox("DEBUG: 'onClientPlayerSerialRequested' returned false.", source, 245, 40, 40, false) 
        end 
    end 
) 

[manve1]

I do look at it, i try few times, i ask help when i never used them and i fail at them, or with something that would be impossible to make for me

[myonlake]

You only had to change one line of code above there. Well did it work or not?

[manve1]

boolean value

[myonlake]

Huh? Boolean value can be true or false, your post doesn't tell me whether is works or not. Any errors in debug?

[manve1]

only error i get is this:

ERROR: attempt to concatenate local 'serial' ( a boolean value ) 

[myonlake]

Replace the below code with the one you can find from the script.

Server-side

triggerClientEvent(source, "onClientPlayerSerialFetched", source, getPlayerSerial(target)) 

[manve1]

yep, worked, ty

[myonlake]

You're welcome, but as a pro-tip, I suggest that you should always go through the code many times yourself and look at what's wrong, it is very simple to notice that something is wrong. This way you can prevent mass posts.