Save a class created with the Builder pattern in Room - kotlin

Question

I need to create a table in my db where I can save Filters so I created this class like this:
#Entity
class Filter private constructor(
val name: String?,
#TypeConverters(Converters::class)
val sortBy: Sort?,
val withGenres: List<Int>?,
val withCast: List<Int>?,
) : Serializable {
#PrimaryKey(autoGenerate = true)
var id: Int? = null
data class Builder(
var name: String? = null,
var sortBy: Sort? = null,
var withGenres: List<Int> = listOf(),
var withCast: List<Int> = listOf(),
) {
fun name(name: String) = apply { this.name = name }
fun sortBy(sort: Sort?) = apply { this.sortBy = sort }
fun withGenres(genresId: List<Int>) = apply { this.withGenres = genresId }
fun withCast(castIds: List<Int>) = apply { this.withCast = castIds }
fun build() = Filter(name, sortBy, withGenres, withCast)
}
/**
* Sorting options, default order is Descendant (desc)
*/
enum class Sort {
POPULARITY, RELEASE_DATE, REVENUE, VOTE_AVERAGE;
private var order: Order = Order.DESC
override fun toString(): String {
return this.name.lowercase() + "." + this.order.name.lowercase()
}
fun setOrder(order: Order) {
this.order = order
}
enum class Order {
ASC, DESC
}
}
override fun toString(): String {
return "sortBy: ${sortBy.toString()}, withGenres: $withGenres"
}
}
But upon compilation I get the following errors:
Cannot configure how to save field withGenres into database
Cannot configure how to save field withCast into database
Entities and POJOs must have public constructor
Cannot find setter for field (all the fields)
How can I modify the code so that it works, what are the problems?