LabCalendar

Error while running the chunk
  [string "Mods/Addons/LabCalendar/Scripts/Main.lua"]:961: bad argument #1 to 'pairs' (table expected, got nil)
  func: ?, ?, line: -1, defined: C, line: -1, [C]
    func: pairs, global, line: -1, defined: C, line: -1, [C]
      func: ShowList, global, line: 961, defined: Lua, line: 958, [string "Mods/Addons/LabCalendar/Scripts/Main.lua"]
        func: ?, ?, line: 951, defined: Lua, line: 947, [string "Mods/Addons/LabCalendar/Scripts/Main.lua"]