Why does it say that com.android.phone has stopped on my mobile phone?

[Android Central Question]

It's an Alcatel U5 3G on android. I'm trying to top up my phone's credit using a top up voucher but when I try to text the voucher number a box pops up saying that com.android. phone has stopped.

 

[B. Diddy]

Welcome to Android Central! The Phone app is glitching for some reason. Does this persist after a reboot?