Kotin class java.lang.ClassNotFoundException

I built example project Kotlin Gradle but it showed error "class not found exception"

Exception in thread "main" java.lang.RuntimeException: java.lang.ClassNotFoundException: Cannot find implementation for org.mapstruct.example.kotlin.converter.PersonConverter
	at org.mapstruct.factory.Mappers.getMapper(Mappers.java:61)
	at org.mapstruct.example.kotlin.MainKt.main(Main.kt:10)
	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:567)
	at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)
Caused by: java.lang.ClassNotFoundException: Cannot find implementation for org.mapstruct.example.kotlin.converter.PersonConverter
	at org.mapstruct.factory.Mappers.getMapper(Mappers.java:75)
	at org.mapstruct.factory.Mappers.getMapper(Mappers.java:58)
	... 6 more

重現 Kotlin Gradle 範例，並檢查第 10 行的 Main.kt，其中 Mappers.getMapper 找不到 PersonConverter。檢查產生的 PersonConverter 實作和執行時期 classpath，然後確認範例能在沒有 ClassNotFoundException 的情況下啟動。