We seem to be having the same issue. I am getting reports from users that the Boxer app crashes when you try to launch the app.
Re-installing the Boxer app from the PlayStore seems to fix the problem.
I confirm that Vmware has performed a rollout, I have sent a bunch of logs to their support, hoping that they find where the problem come from.
For all users having the issue we just uninstall the 5.12.0.2 and reinstalled the previous version 5.11.0.4 (which is the version now avalilable in the playstore).
I will post the answer of the support
for information the bug Id is BINXA-11316
I have suggested that they re-version the v5.11.0.4 as v5.12.0.3 so all devices can install the older working version as an ' upgrade' .
It's annoying that there is no option to force a downgrade to the previous version within the WSOne Console.