Retrofit2. Возвращаемое значение body null

public class Main {
 
    private static final String API_URL = "http://api.rovicorp.com";
    private static final String API_KEY = "dekq58hngayqn3jtdb4q4qnw";
 
    public static void main(String[] args) throws IOException {
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(API_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
 
        RovicorpApi rovicorpApi = retrofit.create(RovicorpApi.class);
        Call<ServiceDetailsResult> call = rovicorpApi.getData("en-US", false, API_KEY);
        ServiceDetailsResult result = call.execute().body();
        if(result != null) {
            List<Channel> channels = result.getChannelLineup().getChannels();
            for (Channel channel : channels) {
                System.out.println(channel.getFullName());
            }
        }
        else System.out.println("Error!");
 
    }
}
 
 
public class Channel {
    @SerializedName("SourceId")
    @Expose
    private Integer sourceId;
    @SerializedName("Channel")
    @Expose
    private String channel;
    @SerializedName("CallLetters")
    @Expose
    private String callLetters;
    @SerializedName("DisplayName")
    @Expose
    private String displayName;
    @SerializedName("SourceType")
    @Expose
    private String sourceType;
    @SerializedName("Type")
    @Expose
    private String type;
    @SerializedName("Order")
    @Expose
    private Integer order;
    @SerializedName("TiVoSupported")
    @Expose
    private Boolean tiVoSupported;
    @SerializedName("ParentNetworkId")
    @Expose
    private Integer parentNetworkId;
    @SerializedName("IconAvailable")
    @Expose
    private Boolean iconAvailable;
    @SerializedName("FullName")
    @Expose
    private String fullName;
    @SerializedName("VirtualChannelNumber")
    @Expose
    private String virtualChannelNumber;
    @SerializedName("Affiliation")
    @Expose
    private Integer affiliation;
    @SerializedName("ServiceType")
    @Expose
    private String serviceType;
    @SerializedName("SourceAttributes")
    @Expose
    private String sourceAttributes;
    @SerializedName("ChannelSchedules")
    @Expose
    private Object channelSchedules;
    @SerializedName("SourceAttributeTypes")
    @Expose
    private List<String> sourceAttributeTypes = null;
    @SerializedName("ChannelLocation")
    @Expose
    private String channelLocation;
    @SerializedName("DvbTriplets")
    @Expose
    private Object dvbTriplets;
 
    public Integer getSourceId() {
        return sourceId;
    }
 
    public void setSourceId(Integer sourceId) {
        this.sourceId = sourceId;
    }
 
    public String getChannel() {
        return channel;
    }
 
    public void setChannel(String channel) {
        this.channel = channel;
    }
 
    public String getCallLetters() {
        return callLetters;
    }
 
    public void setCallLetters(String callLetters) {
        this.callLetters = callLetters;
    }
 
    public String getDisplayName() {
        return displayName;
    }
 
    public void setDisplayName(String displayName) {
        this.displayName = displayName;
    }
 
    public String getSourceType() {
        return sourceType;
    }
 
    public void setSourceType(String sourceType) {
        this.sourceType = sourceType;
    }
 
    public String getType() {
        return type;
    }
 
    public void setType(String type) {
        this.type = type;
    }
 
    public Integer getOrder() {
        return order;
    }
 
    public void setOrder(Integer order) {
        this.order = order;
    }
 
    public Boolean getTiVoSupported() {
        return tiVoSupported;
    }
 
    public void setTiVoSupported(Boolean tiVoSupported) {
        this.tiVoSupported = tiVoSupported;
    }
 
    public Integer getParentNetworkId() {
        return parentNetworkId;
    }
 
    public void setParentNetworkId(Integer parentNetworkId) {
        this.parentNetworkId = parentNetworkId;
    }
 
    public Boolean getIconAvailable() {
        return iconAvailable;
    }
 
    public void setIconAvailable(Boolean iconAvailable) {
        this.iconAvailable = iconAvailable;
    }
 
    public String getFullName() {
        return fullName;
    }
 
    public void setFullName(String fullName) {
        this.fullName = fullName;
    }
 
    public String getVirtualChannelNumber() {
        return virtualChannelNumber;
    }
 
    public void setVirtualChannelNumber(String virtualChannelNumber) {
        this.virtualChannelNumber = virtualChannelNumber;
    }
 
    public Integer getAffiliation() {
        return affiliation;
    }
 
    public void setAffiliation(Integer affiliation) {
        this.affiliation = affiliation;
    }
 
    public String getServiceType() {
        return serviceType;
    }
 
    public void setServiceType(String serviceType) {
        this.serviceType = serviceType;
    }
 
    public String getSourceAttributes() {
        return sourceAttributes;
    }
 
    public void setSourceAttributes(String sourceAttributes) {
        this.sourceAttributes = sourceAttributes;
    }
 
    public Object getChannelSchedules() {
        return channelSchedules;
    }
 
    public void setChannelSchedules(Object channelSchedules) {
        this.channelSchedules = channelSchedules;
    }
 
    public List<String> getSourceAttributeTypes() {
        return sourceAttributeTypes;
    }
 
    public void setSourceAttributeTypes(List<String> sourceAttributeTypes) {
        this.sourceAttributeTypes = sourceAttributeTypes;
    }
 
    public String getChannelLocation() {
        return channelLocation;
    }
 
    public void setChannelLocation(String channelLocation) {
        this.channelLocation = channelLocation;
    }
 
    public Object getDvbTriplets() {
        return dvbTriplets;
    }
 
    public void setDvbTriplets(Object dvbTriplets) {
        this.dvbTriplets = dvbTriplets;
    }
}
 
 
public class ChannelLineup {
    @SerializedName("ServiceId")
    @Expose
    private Integer serviceId;
    @SerializedName("Name")
    @Expose
    private String name;
    @SerializedName("City")
    @Expose
    private String city;
    @SerializedName("Type")
    @Expose
    private String type;
    @SerializedName("MSO")
    @Expose
    private String mSO;
    @SerializedName("MSOID")
    @Expose
    private String mSOID;
    @SerializedName("TimeZones")
    @Expose
    private List<TimeZone> timeZones = null;
    @SerializedName("Channels")
    @Expose
    private List<Channel> channels;
 
    public Integer getServiceId() {
        return serviceId;
    }
 
    public void setServiceId(Integer serviceId) {
        this.serviceId = serviceId;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getCity() {
        return city;
    }
 
    public void setCity(String city) {
        this.city = city;
    }
 
    public String getType() {
        return type;
    }
 
    public void setType(String type) {
        this.type = type;
    }
 
    public String getMSO() {
        return mSO;
    }
 
    public void setMSO(String mSO) {
        this.mSO = mSO;
    }
 
    public String getMSOID() {
        return mSOID;
    }
 
    public void setMSOID(String mSOID) {
        this.mSOID = mSOID;
    }
 
    public List<TimeZone> getTimeZones() {
        return timeZones;
    }
 
    public void setTimeZones(List<TimeZone> timeZones) {
        this.timeZones = timeZones;
    }
 
    public List<Channel> getChannels() {
        return channels;
    }
 
    public void setChannels(List<Channel> channels) {
        this.channels = channels;
    }
}
 
 
public interface RovicorpApi {
    @Headers("X-Originating-Ip: 212.92.190.116")
    @GET("/TVlistings/v9/listings/servicedetails/serviceid/20494/info")
    Call<ServiceDetailsResult> getData(@Query("locale") String locale,
                         @Query("includechannelimages") boolean channelImages,
                         @Query("apikey") String apikey);
}
 
 
public class ServiceDetailsResult {
    @SerializedName("RequestId")
    @Expose
    private String requestId;
    @SerializedName("TimeStamp")
    @Expose
    private String timeStamp;
    @SerializedName("Status")
    @Expose
    private String status;
    @SerializedName("Errors")
    @Expose
    private Object errors;
    @SerializedName("EndTimestamp")
    @Expose
    private String endTimestamp;
    @SerializedName("Build")
    @Expose
    private String build;
    @SerializedName("ChannelLineup")
    @Expose
    private ChannelLineup channelLineup;
 
    public String getRequestId() {
        return requestId;
    }
 
    public void setRequestId(String requestId) {
        this.requestId = requestId;
    }
 
    public ServiceDetailsResult withRequestId(String requestId) {
        this.requestId = requestId;
        return this;
    }
 
    public String getTimeStamp() {
        return timeStamp;
    }
 
    public void setTimeStamp(String timeStamp) {
        this.timeStamp = timeStamp;
    }
 
    public ServiceDetailsResult withTimeStamp(String timeStamp) {
        this.timeStamp = timeStamp;
        return this;
    }
 
    public String getStatus() {
        return status;
    }
 
    public void setStatus(String status) {
        this.status = status;
    }
 
    public ServiceDetailsResult withStatus(String status) {
        this.status = status;
        return this;
    }
 
    public Object getErrors() {
        return errors;
    }
 
    public void setErrors(Object errors) {
        this.errors = errors;
    }
 
    public ServiceDetailsResult withErrors(Object errors) {
        this.errors = errors;
        return this;
    }
 
    public String getEndTimestamp() {
        return endTimestamp;
    }
 
    public void setEndTimestamp(String endTimestamp) {
        this.endTimestamp = endTimestamp;
    }
 
    public ServiceDetailsResult withEndTimestamp(String endTimestamp) {
        this.endTimestamp = endTimestamp;
        return this;
    }
 
    public String getBuild() {
        return build;
    }
 
    public void setBuild(String build) {
        this.build = build;
    }
 
    public ServiceDetailsResult withBuild(String build) {
        this.build = build;
        return this;
    }
 
    public ChannelLineup getChannelLineup() {
        return channelLineup;
    }
 
    public void setChannelLineup(ChannelLineup channelLineup) {
        this.channelLineup = channelLineup;
    }
 
    public ServiceDetailsResult withChannelLineup(ChannelLineup channelLineup) {
        this.channelLineup = channelLineup;
        return this;
    }
 
 
public class TimeZone {
    @SerializedName("StartDateTime")
    @Expose
    private String startDateTime;
    @SerializedName("EndDateTime")
    @Expose
    private String endDateTime;
    @SerializedName("Offset")
    @Expose
    private Integer offset;
 
    public String getStartDateTime() {
        return startDateTime;
    }
 
    public void setStartDateTime(String startDateTime) {
        this.startDateTime = startDateTime;
    }
 
    public String getEndDateTime() {
        return endDateTime;
    }
 
    public void setEndDateTime(String endDateTime) {
        this.endDateTime = endDateTime;
    }
 
    public Integer getOffset() {
        return offset;
    }
 
    public void setOffset(Integer offset) {
        this.offset = offset;
    }
}