Viber restaring

A

AC Question

Hi all,

Since yesterday, my Viber constantly crashes. It openes for like 2-3 seconds, and then it force closes.
So far, I've tried restarting the phone, moving app to SD card, uninstalling and installing, downgrading to previous version, but no luck.

So I'm running latest Viber app, there are also no software updates for ROM (I'm running original ROM, phone is not rooted.)
When I go to running apps in developer options, it just says restarting, 0 processes and 2 services (voipService and AccountAuthenticatorService).

Also, when I go to settings, where is no Viber account to sync, I try to add it, but the account is not there.
I did not install any new apps recently.

I've created issue for Viber support, but honestly it looks that they are reaaaaly slow.
Phone is HTC Desire Eye.

Does anybody have any idea, what is causing this, and how to fix it?