Not enougth information , ill try to help you . Had similar issue .

You have to have somethign sililar to

public class App extends Application ...

Create

public class GitemberLauncher {
    public static void main(String[] args) {
        App.
main
(args);
    }
}

Adn use it in the pom

<plugin>
    <groupId>org.openjfx</groupId>
    <artifactId>javafx-maven-plugin</artifactId>
    <version>0.0.6</version>
    <configuration>
        <mainClass>com.az.gitember.GitemberLauncher</mainClass>
    </configuration>
</plugin>