JVM Crash: No virtual method getParameterCount()I about kotlinx-io HOT 4 CLOSED

val result = client.post<String>("http://httpbin.org/anything") {
                this.body = MultiPartContent.build {
                    add("header", header.length.toLong(), header, ContentType.Application.Json, filename = "blubb")
                    add("payload", payload.length.toLong(), payload, ContentType.Application.Json, filename = "blob")
                }
            }

val result = client.submitFormWithBinaryData<String>(formData {
                append(key = "header", value = "test")

            }) {
                url("http://httpbin.org/anything")
            }