cannot access '

I am trying to parse a yaml in Kotlin using SnakeYAML following this tutorial:

data class Case(val args: List<String>, val expected: String, val score: Int)
data class TestCases(val target: String, val cases: List<Case>)

val yaml = Yaml(Constructor(TestCases::class.java))

but the code returns these errors in IntelliJ

Cannot access '<init>': it is public/*package*/ in 'Constructor'

for using Constructor as in java.lang.reflect.Constructor, and

None of the following functions can be called with the arguments supplied:

• public constructor Yaml(dumperOptions: DumperOptions!) defined in org.yaml.snakeyaml.Yaml
• public constructor Yaml(loadingConfig: LoaderOptions!) defined in org.yaml.snakeyaml.Yaml
• public constructor Yaml(constructor: BaseConstructor!) defined in org.yaml.snakeyaml.Yaml
• public constructor Yaml(representer: Representer!) defined in org.yaml.snakeyaml.Yaml

for using Yaml as in org.yaml.snakeyaml.Yaml, which I think is expecting a BaseConstructor from Constructor.

How can I fix this problem? Thank you.