Debut de Dashboard avec un erreur :(

src/main/java/frc/robot/commands/Force1.java

@@ -4,16 +4,19 @@
 
 package frc.robot.commands;
 
+import edu.wpi.first.wpilibj.shuffleboard.Shuffleboard;
+import edu.wpi.first.wpilibj.shuffleboard.ShuffleboardTab;
 import edu.wpi.first.wpilibj2.command.CommandBase;
 import frc.robot.subsystems.Lanceur;
 
 public class Force1 extends CommandBase {
   private Lanceur lanceur;
-
+  ShuffleboardTab dashboard = Shuffleboard.getTab("Dashboard");
   /** Creates a new Force1. */
   public Force1(Lancer lancer) {
     this.lanceur = lanceur;
     addRequirements(lanceur);
+    dashboard.addDouble("Force1",this::lanceur);
     // Use addRequirements() here to declare subsystem dependencies.
   }