Severe: MessageBodyWriter not found for media type=application/json

Hi,

I'm just starting out with Java and I'm trying to build a simple API.

The issue I'm having is that I'm getting this message when trying to return an Object as JSON.

Severe:   MessageBodyWriter not found for media type=application/json

I've setup the application with Maven, and as a result of some research I've added the following dependancies to the pom.xml file in the hope that it would resolve the issue.

<dependency>
            <groupId>com.owlike</groupId>
            <artifactId>genson</artifactId>
            <version>0.99</version>
        </dependency>
        
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.8</version>
        </dependency>

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The method I have which is trying to return the Object as JSON is as follows;

@GET
    @Produces("application/json")
    public Person getAll() {
        Person me = new Person("John", "Doe", "test@test.com");
        
        return me;
    }

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Can anyone see where I'm going wrong? Do I need to add anything to the web.xml file to make it work?java