Callback Error

[Legacy-TacticalGamingInteractive]

I am getting this server sided error in console:

[     script:loaf_lib] SCRIPT ERROR: @loaf_lib/server/functions/logs.lua:23: attempt to index a nil value (local 'text')
[     script:loaf_lib] > userCallback (@loaf_lib/server/functions/logs.lua:23)

local function GetPlayerPicture(source)
    if not GetPlayerName(source) then return false end

    local steam = GetIdentifier(source, "steam")
    if not steam then
        return false
    end
    local url
    PerformHttpRequest("https://steamcommunity.com/profiles/" .. tonumber(steam, 16), function(_, text, _) 
        if not text then url = false end
        url = text:match('<meta name="twitter:image" content="(.-)"')  <--------------------
    end, "GET")
    while url == nil do
        Wait(0)
    end
    return url
end

Is there a way to fix?