All of a sudden, one of our programmers is getting the following error on any project. I have never seen it before. They are running a recent WPILib (before the release a few days ago; 2021.2.1 or 2021.2.2). I am wondering if anyone has any ideas or knows how to help troubleshoot?
Here is the error.
Exception in thread "main" java.lang.Error: Unresolved compilation problem: RobotBase cannot be resolved at frc.robot.Main.main(Main.java:23)