after reading some documentation I found that the error in my case was mainly due to two misconfigurations that I had: first: I needed to add the plugin in the gradle at the app and project level, I solved this as follows: adding in gradle.project the next line: id ‘org.jetbrains.kotlin.plugin.serialization’ version ‘1.6.21’ As is seen … Read more
Are you using Maven or Gradle for your project? I had the same issue with Gradle, but I was able to remove the warnings by putting the -Xuse-experimental=kotlin.Experimental in my build.gradle file, inside a tasks.withType. For KtorExperimentalLocationsAPI you could try: tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all { kotlinOptions.freeCompilerArgs += [“-Xuse-experimental=io.ktor.locations.KtorExperimentalLocationsAPI”] }
I figured it out, apparently even though you mark something as nullable its still considered required. For it to truly be optional you need to give it a default value so for example the data class would look like this with the nullables @Serializable data class ResponseData( val id: Long val attachments: Attachments? = null, … Read more