Why is this unexpected error message appearing? r?

[Android Central Question]

I have a sony xperia xz premium, and for some reason after hanging up from a phone call, I got an error message that says:
unexpected error. Closing application.Attempt to invoke virtual method 'org.jivesoftware.smack.AbstractXMPPConnectin org.jivesoftware.smack.tcp. XMPPTCPConnection.connect()' on a null object reference
It keeps popping up, fading away and then popping back up.

 

[B. Diddy]

Welcome to Android Central! There's a similar thread over here: https://forums.androidcentral.com/a...id-a7-2018-since-last-update.html#post6546614.

Smack is an API related to messaging, so it might be an error related to one of your apps that has some kind of messaging option. https://www.igniterealtime.org/projects/smack/