Check that mod is a folder and not empty

data/ui_scripts/mods/loading.lua

@@ -85,6 +85,7 @@ LUI.MenuBuilder.m_types_build["mods_menu"] = function(a1)
     if (io.directoryexists("mods")) then
         local mods = io.listfiles("mods/")
         for i = 1, #mods do
+            if (io.directoryexists(mods[i]) and not io.directoryisempty(mods[i])) then
                 local name, desc = getmodname(mods[i])
 
                 if (mods[i] ~= modfolder) then
@@ -96,6 +97,7 @@ LUI.MenuBuilder.m_types_build["mods_menu"] = function(a1)
                 end
             end
         end
+    end
     
     menu:AddBackButton(function(a1)
         Engine.PlaySound(CoD.SFX.MenuBack)