A modern programming language that makes developers happier.

kotlinlang

errors are gone, but now I get the following error:
```
Error:Kotlin: [Internal Error] java.lang.IllegalStateException: The provided plugin org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationComponentRegistrar is not compatible with this version of compiler
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.&lt;init&gt;(KotlinCoreEnvironment.kt:178)
```
I use Kotlin 1.2.21 as recommended -.Information:Kotlin: kotlinc-jvm 1.2.21 (JRE 1.8.0_151-b12)