Can't open Briefcase if one of the forms is broken

[grzesiek2010]

Software versions

Briefcase v1.17.0

Problem description

The problem has been reported on the forum: https://forum.opendatakit.org/t/odk-briefcase-1-17-0-not-opening/23360

I was able to reproduce it using the attached form:
fieldListSimpleTest.xml.txt

you can do that using any form, just remove the last char > and add ? for example.

Steps to reproduce the problem

1. Add the attached (broken) form to ODK Briefcase Storage/forms/
2. Try to start Briefcase

Expected behavior

The form should be just ignored if it's broken.