.NET for Android error XA1003
Issue
This error will be emitted if the expected .zip file is not found when compiling the Java code to Dalvik. As part of the build process, all the .class files will be zipped up into a classes.zip file. This file is then used by the Dalvik compiler to produce the code for the final application.
If the classes.zip file is missing, it is likely you have an error earlier in the build process.
Solution
Please Clean and Build your application again to correct this issue.
If the problem persists, raise an issue.