The right answer is, that some of your jar files does not compile.
You should go into your build.gradle file in your project, and look in your dependencies.
If you’re just importing some jar files, you could try to remove them and add them one at a time. This will help you determine which one of them causes the error.
In my case, I did just that, and when I was importing the last one, the app compiled. So I think the real problem was that I was importing too many at once. But now it all works.