I had this same problem
First set build output verbosity using
BTW, I managed to find what’s the problem by setting build output verbosity to
Diagnostic in Tools -> Options -> Projects and Solutions -> Build and Run which gives a detailed info why the build failed in the Output window.
Then do a search.
In my case I had
Resources\layout\Main.axml(2): error APT0000: Integer types not allowed (at ‘textSize’ with value ’90’). (TaskId:176)
CRAP! I need to change it to 90sp (Of course)
grr that wasted too much time.