My game has failed to build

There are a number of reasons why your game may have failed to build, but if you are sure that it is not due to your game code containing errors then please try the following to resolve the issue:

1. Update (or install) the Android SDK.
2. Update (or install) the Java SDK (Note it's the JDK, not JRE that you need).
3. Uninstall and re-install GameMaker:Studio making sure that you also remove the GameMaker:Studio files from your AppData Roaming and Local folders. Note that you will need to re-enter your licence when you have finished re-installing GameMaker:Studio.