Options menu isn't working

Once the options menu pops up by the user pressing F3, the player gets a LUA error in the console. The options menu also seems very bare, only having a "random levels' option.

```

[NPC-Information] lua/npcinfo/vgui/vgui_checkbox.lua:26: bad argument #1 to 'SetMaterial' (IMaterial expected, got nil)
  1. SetMaterial - [C]:-1
   2. unknown - lua/npcinfo/vgui/vgui_checkbox.lua:26

```
