I'm trying to use kotlinx but I'm getting this err...

# serialization

[Rodrigo Silva]

I'm trying to use kotlinx but I'm getting this error:

[Rodrigo Silva]

Exception in thread "main" java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at kotlin.reflect.jvm.internal.calls.CallerImpl$Method.callMethod(CallerImpl.kt:97)
	at kotlin.reflect.jvm.internal.calls.CallerImpl$Method$Static.call(CallerImpl.kt:106)
	at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflection(KCallableImpl.kt:166)
	at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:110)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.callFunctionWithInjection(ApplicationEngineEnvironmentReloading.kt:384)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.executeModuleFunction(ApplicationEngineEnvironmentReloading.kt:330)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.access$executeModuleFunction(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1$$special$$inlined$forEach$lambda$1.invoke(ApplicationEngineEnvironmentReloading.kt:275)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1$$special$$inlined$forEach$lambda$1.invoke(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.avoidingDoubleStartupFor(ApplicationEngineEnvironmentReloading.kt:310)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.access$avoidingDoubleStartupFor(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1.invoke(ApplicationEngineEnvironmentReloading.kt:274)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1.invoke(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.avoidingDoubleStartup(ApplicationEngineEnvironmentReloading.kt:290)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.instantiateAndConfigureApplication(ApplicationEngineEnvironmentReloading.kt:272)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.createApplication(ApplicationEngineEnvironmentReloading.kt:125)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.start(ApplicationEngineEnvironmentReloading.kt:245)
	at io.ktor.server.netty.NettyApplicationEngine.start(NettyApplicationEngine.kt:126)
	at io.ktor.server.netty.EngineMain.main(EngineMain.kt:26)
	at com.rjdesenvolvimento.aries.ApplicationKt.main(Application.kt:16)
Caused by: java.lang.NoSuchMethodError: kotlinx.serialization.json.JsonConfiguration.copy$default(Lkotlinx/serialization/json/JsonConfiguration;ZZZZZLjava/lang/String;ZLjava/lang/String;Lkotlinx/serialization/UpdateMode;ILjava/lang/Object;)Lkotlinx/serialization/json/JsonConfiguration;
	at io.ktor.serialization.SerializationConverterKt.<clinit>(SerializationConverter.kt:82)
	at com.rjdesenvolvimento.aries.ApplicationKt$module$3.invoke(Application.kt:38)
	at com.rjdesenvolvimento.aries.ApplicationKt$module$3.invoke(Application.kt)
	at io.ktor.features.ContentNegotiation$Feature.install(ContentNegotiation.kt:101)
	at io.ktor.features.ContentNegotiation$Feature.install(ContentNegotiation.kt:94)
	at io.ktor.application.ApplicationFeatureKt.install(ApplicationFeature.kt:64)
	at com.rjdesenvolvimento.aries.ApplicationKt.module(Application.kt:37)
	at com.rjdesenvolvimento.aries.ApplicationKt.module$default(Application.kt:20)
	... 24 more

[Rodrigo Silva]

My Application.kt

[Rodrigo Silva]

Could anyone help?

[Nikky]

since its a NoSuchMethod error. make sure your kotlinx-serialization-runtime dependency is of the correct version, probably should be 0.20.0