FATAL EXCEPTION: main KotlinNullPointerException

Question

This is my first time building an android application. However when i run the app on my Virtual Device, it stopped working and keeps crashing. The error says something about

Answer 1

val date: EditText? = null
val changeDate: CheckBox? = null
val yes: RadioButton? = null
val no: RadioButton? = null

Before using these variables, initialize them with findViewById or bind them to the xml view.