“The user interface has stopped working” and bootloop

Hello everyone,

One of my users got her LG G3s device bricked after booting it one day : [UNOFFICIAL BUILD] LG G3s Beat (jagnm) - #4 by breversa

The phone either is in bootloop, or displays “The user interface has stopped working” once boot has finished.

I’m posting here in the event that someone met the same fate and found a solution.
The link above provides details and logcat.

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone