Vaadin component Upload as Spring component

Colleagues, I am confused to place the Vaadin Upload component inside the Spring component. Source code below:

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@Route
@PWA(name = "Project Base for Vaadin Flow with Spring", shortName = "Project Base")
public class MainView extends VerticalLayout {

    public MainView(Uploader uploader) {
        add(uploader);
    }
}
@Component
class Uploader extends HorizontalLayout {
    private final Upload upload;
    public Uploader() {
        MemoryBuffer buffer = new MemoryBuffer();
        upload = new Upload(buffer);
        add(upload);
    }
}

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В этом случае летит ошибка:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'uploader' defined in file 

[/home/chernov/work/secutity/target/classes/ru/mobilcard/cvr/spring/Uploader.class]: Instantiation of bean failed;

Однако код, приведенный ниже прекрасно работает:

public class MainView extends VerticalLayout {

    public MainView() {
        add(new Uploader());
    }
//@Component
class Uploader extends HorizontalLayout {
    private final Upload upload;
    public Uploader() {
        MemoryBuffer buffer = new MemoryBuffer();
        upload = new Upload(buffer);
        add(upload);
    }
}


}
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Hey! has there been a solution to this problem? Played on Vaadin 14.4.9 and upload 4.1.1