I tried getting some help in the Android sub-forum and got no help, so I'm trying here instead.
I'm running Xamarin Studio V4.2.2 with Xamarin.Android V4.10.1 (Starter Edition) on Windows 7 64-bit SP1, and I can't build any C# Android Applications.
When I attempt to build or clean any C# Android Application, I get the error "Build Failed." or "Clean Failed.", along with the text "The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters."
I get the error when I create a new C# Android Application, C# Android Honeycomb Application, or C# Android Ice Cream Sandwich Application, and try to build it before adding any code. It also happens when I attempt to build the downloaded HelloWorld Application.
I tried uninstalling Xamarin on my development PC and reinstalling it, but the error persists. I also just recently installed Xamarin Studio and Xamarin.Android on a brand new Windows 7 64-bit PC (including installing all updates), and it gives the error also (can't build or clean ANY Android applications).
As you can see in this thread:
http://forums.xamarin.com/discussion/comment/34799
I am not the only one experiencing this problem. I would really like to continue to use Xamarin to develop apps, but as of now, Xamarin is useless to me.
I'm hoping it is a simple configuration option that I have overlooked. Thank you for your time.