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kotlinlang

Hi! I just upgraded to Moshi 1.9.2 and I have the following data class:
```@JsonClass(generateAdapter = true)
data class ApplicationGroup(
    val id: Int,
    val header: String,
    val subHeader: String = ""
)```
but I'm getting this error:
```    java.lang.NoSuchMethodException: parameter type is null
        at java.lang.Class.getConstructor(Class.java:526)
        at java.lang.Class.getDeclaredConstructor(Class.java:510)
        at com.....ApplicationGroupJsonAdapter.fromJson(ApplicationGroupJsonAdapter.kt:62)
        at com.....ApplicationGroupJsonAdapter.fromJson(ApplicationGroupJsonAdapter.kt:19)
        at com.squareup.moshi.u.b.fromJson(NullSafeJsonAdapter.java:40)
        at com.squareup.moshi.d.fromJson(CollectionJsonAdapter.java:76)
        at com.squareup.moshi.d$b.fromJson(CollectionJsonAdapter.java:53)
        at com.squareup.moshi.u.b.fromJson(NullSafeJsonAdapter.java:40)
        at com.squareup.moshi.f$c.fromJson(JsonAdapter.java:197)```
what could be causing this?