Jackson : Can not deserialize instance of java.util.ArrayList out of VALUE_TRUE token

[
    {
        // JSON for VariablePresentation value 0
        "field0": <some-value>
        <etc...>
    },
    <etc...>
]

public class CustomerTest {
    final String path = "http://localhost:8080/RestEasy-Spring-MVC-Hibernate/";
    ICustomerService proxy = null;

    @Before
    public void beforeClass(){
        ResteasyClient client = new ResteasyClientBuilder().build();
        ResteasyWebTarget target = client.target(UriBuilder.fromPath(path));
        proxy = target.proxy(ICustomerService.class);
    }

    @Test
    public void testGetallcustomer() throws Exception {
        CustomerListType customers = proxy.getAllCustomerInfo();
        List<CustomerType> customerTypes = customers.getCustomerType();
        for (CustomerType customerType : customerTypes) {
            System.out.println("----------------------------------------------------");
            System.out.println("Name       : "+customerType.getName());
            System.out.println("Age        : "+customerType.getAge());
            System.out.println("CustomerId : "+customerType.getCustomerId());
        }
    }
}

data class ActivityConfig(
    @JsonProperty("activities-steps") val steps: List<ActivitiesSteps> = emptyList()
)

data class ActivitiesSteps(var dateTime: String, var value: String)

val stepsList = mapper.readValue<ActivityConfig>(jsonSteps).steps

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.File;
import java.util.List;

public class JsonApp {

    public static void main(String[] args) throws Exception {
        File jsonFile = new File("./src/main/resources/test.json");

        ObjectMapper mapper = new ObjectMapper();
        mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);

        Orgnization root = mapper.readValue(jsonFile, Orgnization.class);
        System.out.println(root);
    }
}