Keep getting error message on start/reload.

[innuk]

This message keeps appearing on startup/reload. No other actions are necessary for this to appear.

"Message:
Interface\AddOns\ElvUI_TankHealth\main.lua:378:
attempt to index field 'HealPrediction' (a nil value)
Time: 08/11/17 21:05:08
Count:1
Stack:
Interface\AddOns\ElvUI_TankHealth\main.lua:378:
attempt to index field 'HealPrediction' (a nil
value)Interface\AddOns\ElvUI\core\core.lua:1491
in function 'Initialize'
Interface\AddOns\ElvUI\init.lua:137: in function
<Interface\AddOns\ElvUI\init.lua:136>

Locals: "