Problem/Bug Problem using MNS with Bukkit 1.14

Hello,

I am actually developping Plugin with Bukkit 1.14 with some dependencies :

Code:

        <dependency>
            <groupId>org.bukkit</groupId>
            <artifactId>bukkit</artifactId>
            <version>1.14.4-R0.1-SNAPSHOT</version>
            <type>jar</type>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
            <version>1.14.4-R0.1-SNAPSHOT</version>
            <type>jar</type>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.sk89q.worldguard</groupId>
            <artifactId>worldguard-core</artifactId>
            <version>7.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.sk89q.worldguard</groupId>
            <artifactId>worldguard-bukkit</artifactId>
            <version>7.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.sk89q.worldguard.worldguard-libs</groupId>
            <artifactId>core</artifactId>
            <version>7.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.googlecode.json-simple</groupId>
            <artifactId>json-simple</artifactId>
            <version>1.1.1</version>
        </dependency>

I am trying to use NMS to call class but I got strange error :

I don't understand why my EntityEnderDragon got no init function with World parameter.

Here is my code :

Code:

Class<?> nmsDragonClass = NMSUtils.getNMSClass("EntityEnderDragon");
            nmsDragon = ReflectionUtils.newInstance(nmsDragonClass, new Class<?>[] { NMSUtils.getNMSClass("World") }, NMSUtils.getHandle(player.getLocation().getWorld()));

Code:

    public static Class<?> getNMSClass(String name) {
        String className = "net.minecraft.server." + version  + "." + name;
        Class<?> clazz = null;
        try {
            clazz = Class.forName(className);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return clazz;
    }

Code:

    public static Object newInstance(Class<?> cls, Class<?>[] params, Object... args) {
        try {
            return cls.getConstructor(params).newInstance(args);
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (SecurityException e) {
            e.printStackTrace();
        }
        return null;
    }

I got finally yhis error :

but it is probably link to this warning error...

Could you explain me what am I doing wrong ?

Thanks a lot