问我正在尝试对SpaceX进行API调用，但我的响应中不断收到错误。是我的POJO出了问题吗？

EN

E/AndroidRuntime: FATAL EXCEPTION: DefaultDispatcher-worker-1
    Process: com.example.spacex, PID: 13481
    com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:226)
        at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:39)
        at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:27)
        at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:225)
        at retrofit2.OkHttpCall$1.onResponse(OkHttpCall.java:121)
        at okhttp3.RealCall$AsyncCall.execute(RealCall.java:206)
        at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)

I/Choreographer: Skipped 83 frames!  The application may be doing too much work on its main thread.
I/OpenGLRenderer: Davey! duration=1418ms; Flags=0, IntendedVsync=15042096638405, Vsync=15043479971683, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=15043493004500, AnimationStart=15043493189900, PerformTraversalsStart=15043494154700, DrawStart=15043498745100, SyncQueued=15043501592400, SyncStart=15043502485000, IssueDrawCommandsStart=15043502592300, SwapBuffers=15043503508300, FrameCompleted=15043516419500, DequeueBufferDuration=921000, QueueBufferDuration=671000, 
I/System.out: SpaceXResponse(missionName=CRS-20, staticFireDateUtc=2020-03-01T10:20:00.000Z, launchYear=2020, launchDateUtc=2020-03-07T04:50:31.000Z, launchFailureDetails=null, flightNumber=91, isTentative=false, rocket=Rocket(secondStage=SecondStage(payloads=[PayloadsItem(payloadType=Dragon 1.1, payloadMassKg=1977.0, payloadId=CRS-20, nationality=United States, noradId=[], customers=[NASA (CRS)], orbit=ISS, orbitParams=OrbitParams(periapsisKm=null, meanAnomaly=null, inclinationDeg=null, regime=low-earth, argOfPericenter=null, eccentricity=null, apoapsisKm=null, semiMajorAxisKm=null, raan=null, epoch=null, lifespanYears=null, referenceSystem=geocentric, periodMin=null, meanMotion=null, longitude=null), payloadMassLbs=4358.539, reused=true, manufacturer=SpaceX)], block=5.0), rocketId=falcon9, firstStage=FirstStage(cores=[CoresItem(flight=2, landingType=RTLS, gridfins=true, landingIntent=true, legs=true, landSuccess=true, landingVehicle=LZ-1, block=5.0, reused=true, coreSerial=B1059)]), rocketType=FT, rocketName=Falcon 9, fairings=null), missionId=[EE86F74], launchWindow=0, crew=null, launchDateLocal=2020-03-06T23:50:31-05:00, tentativeMaxPrecision=hour, ships=[], launchDateUnix=1583556631, launchSuccess=true, staticFireDateUnix=1583058000, tbd=false, timeline=null, telemetry=Telemetry(flightClub=null), links=Links(missionPatchSmall=https://i.imgur.com/LIrgTnt.png, missionPatch=https://i.imgur.com/LIrgTnt.png, videoLink=https://youtu.be/1MkcWK2PnsU, flickrImages=[], redditRecovery=null, redditMedia=null, redditCampaign=https://www.reddit.com/r/spacex/comments/ezn6n0/crs20_launch_campaign_thread, wikipedia=https://en.wikipedia.org/wiki/SpaceX_CRS-20, redditLaunch=https://www.reddit.com/r/spacex/comments/fe8pcj/rspacex_crs20_official_launch_discussion_updates/, youtubeId=1MkcWK2PnsU, presskit=https://www.spacex.com/sites/spacex/files/crs-20_mission_press_kit.pdf, articleLink=null), details=SpaceX's 20th and final Crew Resupply Mission under the original NASA CRS contract, this mission brings essential supplies to the International Space Station using SpaceX's reusable Dragon spacecraft. It is the last scheduled flight of a Dragon 1 capsule. (CRS-21 and up under the new Commercial Resupply Services 2 contract will use Dragon 2.) The external payload for this mission is the Bartolomeo ISS external payload hosting platform. Falcon 9 and Dragon will launch from SLC-40, Cape Canaveral Air Force Station and the booster will land at LZ-1. The mission will be complete with return and recovery of the Dragon capsule and down cargo., launchSite=LaunchSite(siteName=CCAFS SLC 40, siteId=ccafs_slc_40, siteNameLong=Cape Canaveral Air Force Station Space Launch Complex 40), upcoming=false)

class MainViewModel : ViewModel() {
    private val spaceRepo : Repository = Repository(SpaceService.spaceApi)
    val spaceLiveData = liveData(Dispatchers.IO){
        val data = spaceRepo.getLaunch()
        emit(data)
        println(data)
    }
}

class Repository(private val apiInterface : SpaceXInterface) {
    suspend fun getLaunch() = apiInterface.fetchLaunches()
}

object SpaceService{

   private const val BASE_URL : String = "https://api.spacexdata.com/"

   private val retrofit = Retrofit.Builder()
      .baseUrl(BASE_URL)
      .addConverterFactory(GsonConverterFactory.create())
      .addCallAdapterFactory(CoroutineCallAdapterFactory())
      .build()

   val spaceApi: SpaceXInterface = retrofit.create(SpaceXInterface::class.java)
}

interface SpaceXInterface {

    @GET("v3/launches/latest")
    suspend fun fetchLaunches() : SpaceXResponse

}

data class SpaceXResponse(

    @field:SerializedName("mission_name")
    val missionName: String? = null,

    @field:SerializedName("static_fire_date_utc")
    val staticFireDateUtc: String? = null,

    @field:SerializedName("launch_year")
    val launchYear: String? = null,

    @field:SerializedName("launch_date_utc")
    val launchDateUtc: String? = null,

    @field:SerializedName("launch_failure_details")
    val launchFailureDetails: LaunchFailureDetails? = null,

    @field:SerializedName("flight_number")
    val flightNumber: Int? = null,

    @field:SerializedName("is_tentative")
    val isTentative: Boolean? = null,

    @field:SerializedName("rocket")
    val rocket: Rocket? = null,

    @field:SerializedName("mission_id")
    val missionId: List<Any?>? = null,

    @field:SerializedName("launch_window")
    val launchWindow: Int? = null,

    @field:SerializedName("crew")
    val crew: Any? = null,

    @field:SerializedName("launch_date_local")
    val launchDateLocal: String? = null,

    @field:SerializedName("tentative_max_precision")
    val tentativeMaxPrecision: String? = null,

    @field:SerializedName("ships")
    val ships: List<Any?>? = null,

    @field:SerializedName("launch_date_unix")
    val launchDateUnix: Int? = null,

    @field:SerializedName("launch_success")
    val launchSuccess: Boolean? = null,

    @field:SerializedName("static_fire_date_unix")
    val staticFireDateUnix: Int? = null,

    @field:SerializedName("tbd")
    val tbd: Boolean? = null,

    @field:SerializedName("timeline")
    val timeline: Timeline? = null,

    @field:SerializedName("telemetry")
    val telemetry: Telemetry? = null,

    @field:SerializedName("links")
    val links: Links? = null,

    @field:SerializedName("details")
    val details: String? = null,

    @field:SerializedName("launch_site")
    val launchSite: LaunchSite? = null,

    @field:SerializedName("upcoming")
    val upcoming: Boolean? = null
)