hi, I've implemented a very simple class with 3 fields:

import kotlinx.serialization.Serializable

@Serializable
data class BirdImage(
    val author: String,
    val category: String,
    val path: String
)

and I have this http client using Ktor

val httpClient = HttpClient {
    install(ContentNegotiation) {
        json()
    }
}

then i've got this simple method to just get the results from that URL

private suspend fun getImages(): List<BirdImage> {
    val images = httpClient
        .get("<https://sebastianaigner.github.io/demo-image-api/pictures.json>")
        .body<List<BirdImage>>()
    return images
}

I am always getting back:

Expected class kotlinx.serialization.json.JsonObject as the serialized body of kotlinx.serialization.Polymorphic<List>, but had class kotlinx.serialization.json.JsonArray

if i wanna run that call

println(getImages())

kotlinx.serialization is at version

1.5.1

ktor is at

2.3.1

- tried with

2.3.2

as well, same The code is here https://github.com/Odaym/cmp-1/blob/main/shared/src/commonMain/kotlin/App.kt

there's no 1.9.0

That is not true. Serialization plugin is released together with Kotlin, so for every Kotlin version there's a matching serialization plugin version

Aha then