I'm new at this and I'm learning....
What I meant is that 'brian_diehl' posted here the same problem on 30 july 2015 >>>> he wrote:
"I am attempting to run the latest version (2.1.2) on OS X 10.10.5, and am given this notification:
<?xml version="1.0" encoding="utf-8"?>
Any thoughts?"
The same is happening to me.
I have used(with Maibox beta) with no problem for a long time, but today I received this notification.