TSM Error

Message: ...face\AddOns\TradeSkillMaster\Core\UI\MainUI\Core.lua:10: attempt to index field 'MainUI' (a nil value)
Time: 10/20/18 15:13:00 (276762349)
Client: 8.0.1
Locale: enUS
Combat: false
Error Count: 1
Stack Trace:
    [C]: ?
face\AddOns\TradeSkillMaster\Core\UI\MainUI\Core.lua:10: in main chunk
    face\AddOns\TradeSkillMaster\Core\UI\MainUI\Core.lua:10: in main chunk
        _ = "TradeSkillMaster"
        TSM = {}
Temp Table Info:
  <none>
Object Pool Info:
  TABLE_ROWS (0 created, 0 in use)
    <none>
TSM Thread Info:
    empty result
TSM Debug Log:

Addons:
    TSM (v4.4.6)
    TSM_AppHelper (v4.0) [Not Loaded]