Question Unable to charge. Battery temperature too low.

I recently replaced the digitizer on a Galaxy Tab 4 & that part at least went smoothly. The problem now is that the tablet will only turn on while it's plugged in... and when it does come on, it displays the msg "Unable to charge. Battery temperature too low." Yes, too low.. not too high.

I've tried re-connecting the battery, letting the tablet sit for an hour & even took the battery out and applied some heat to it with my heat gun(from a distance).

Does anyone know for sure what's causing this?