Solved Cannot make a static reference to non-static field

I've been trying to execute this snippet of code:

Code:

package quest;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDeathEvent;
import org.bukkit.event.player.PlayerJoinEvent;
public class QuestManager implements Listener {
    private Player player;
    Quest1 quest1;
    QuestManager(Player p) {
        player = p;
        quest1 = new Quest1(player, "The beginning", "The description", "You've begun your first quest!", "Your first quest ends here. Good luck!");
    }
   
    @EventHandler
    public static void onEntityDeath(EntityDeathEvent event) {
        if (quest1.checkIfActive() == true) {
            player.sendMessage("Quest is active!");
        }
    }
}

However, there is an error telling me that:
Cannot make a static reference to the non-static field quest1
Cannot make a static reference to the non-static field player

Quest1.java:

Code:

package quest;
import org.bukkit.Material;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

public class Quest1 implements IQuest {
private boolean isActive = false;
//some code here
    public boolean checkIfActive() {
        return this.isActive;
}

What might be the solution?

 

it worked, thank you!