Java (Please help me with this error)

Exception in Application start method Ajava. lang. reflect. InvocationTargetException at Javafx.graphics/com. sun. Javafx. application. LauncherImpl. LaunchApplicationWithArgs (Laur at Javafx.graphics/com. sun. Javafx. application. LauncherImpl. ZaunchApplication (Launcher Impl at java. base/sun. Launcher. LauncherHelper\$FXHezper. main (LauncherHelper. Java:1081) Caused by: java. Zang. RuntimeException Createbreskpoint : Exception in Application start method at javafx.graphics/con. sun. Javafx. Gpplication. LauncherImpl. LaunchApplication1 (LauncherImp at javafx.graphics/com. sun. javafx. application. LauncherImpl. Lambda LaunchApplication $ (Lau Baused by: java. Lang. IndexoutofBoundsException Createbreakpoint : Index -1 out of bounds for leng at java.base/java.util. objects.checkIndex (0bjects. java:385) at java.base/java.util. Arraylist.get (ArrayList. java:427) at Quiz.getCurrentQuestion(Quiz, java:21) at Game.start(Gane. java:39) at javafx.graphics/con.sun.javafx.application. Launcherimpl. Lambda\$2aunchApplication1\$9 (La at javafx. graphics/com. sun. javafx.application.PlatformImpl, LambdaSrunAndWait 12 CPlatformI at javafx. graphics/com.sun. javafx.application. PlatformImpl. LambdastunLater $1 (plat formImp at javafx. graphics/com. sun. javafx. application. PlatformImpl. LambdasrunLaten $11 (plat formImp at javafx.graphics/con. sun.glass. ui. InvokeLaterdispatcher\$Future. run (InvokeLaterDispatche at javafx.graphics/com. Sun.glass. vi.win.WinApplication._runLoop( Wative Hethod) at javafx.graphics/com. sun.glass. vi. win. WinApplication. Lambda\$runLoop\$3(winApplication. ja .. 1 more Exception running application Gane Process finished with exit code 1 questionLabel = new Label(model, jgetcurrentQuestion().getQuestion())); scoreLabel = new Label ( text: "Score: " + model. getScore()); answerField = new TextField( ); Button submitButton = new Button( Button nextButton = "Submit"); public Quizquestion getCurrentQuestion() \{ return questions. Get(currentQuestion); \}