This means you're missing a class that Java needs for this program. Check if you're not missing the jsr305-1.3.7.jar from your classpath, it's the jar that contains the class javax.annotation.Nullable.
Don't give up yet. Our experts can help. Paste your full stack trace to get a solution.
You have a different solution? A short tip here would help you and many other users who saw this issue last week.