Both exercise and solution branches do not compile with error:
Cannot find a setter for <android.widget.TextView android:text> that accepts parameter type 'error.NonExistentClass'
If a binding adapter provides the setter, check that the adapter is annotated correctly and that the parameter type matches.
I had the same issue. To solve it, delete your .idea and your .gradle folder so that Android studio can rebuild your project from scratch. This will fix the issue.
Both
exercise
andsolution
branches do not compile with error:I did not change the code at all.