Xenin F4 - The DarkRP F4 menu

Getting the following error when trying to use this add on

[xenin_f4] vgui.Create failed to create the VGUI component (XeninInventory.XeninInventory)
1. Add - lua/includes/extensions/client/panel.lua:495
2. CreatePanel - lua/xeninui/elements/sidebar_v2.lua:83
3. Init - addons/xenin_f4/lua/xenin_f4/ui/frame/main.lua:35
4. Create - lua/includes/extensions/client/panel/scriptedpanels.lua:37
5. OpenMenu - addons/xenin_f4/lua/xenin_f4/ui/frame/main.lua:130
6. openF4Menu - addons/xenin_f4/lua/xenin_f4/ui/jobs/main.lua:488
7. Call - addons/xenin_f4/lua/xenin_f4/ui/jobs/main.lua:491
8. unknown - gamemodes/darkrp/gamemode/modules/base/cl_gamemode_functions.lua:64