@ConfigurationProperties not working with List of Objects

[ShivaniSK]

I am trying to add a properties file and map its values to class using ConfiugrationProperties annotation.
However its not mapping the List of objects.

Sample file

package com.db.elysium.adapter.notification.config

import com.db.autobahn.alerts.client.model.Classification
import io.micronaut.context.annotation.ConfigurationProperties
import org.slf4j.Logger
import org.slf4j.LoggerFactory

@ConfigurationProperties("notifications")
class NotificationsConfig {
    private val log: Logger = LoggerFactory.getLogger(this::class.java)

    var test: String? = null

    var notificationsList: MutableList<NotificationConfig>? = null

    init {
        log.info("Loaded notifications: $notificationsList")
    }
}

class NotificationConfig(
    var name: String? = null,
    var toList: List<String>? = null,
    var ccList: List<String>? = null,
    var emailSubject: String = "test",
    var emailClassification: Classification? = null,
    var emailTemplate: String? = null,
)

Sample config file

While trying to read the value using NotificationsConfig object, the "test" field value is correctly mapped as "hello"however the "notificationsList" is coming as null.

Is there anything missed out here.

[ShivaniSK]

Closing the discussion. Issue was with the emailClassification type "Classification" which was an enum coming from another library. Since was not able to mark it as Serdabale it was failing. Post changing it to a String it worked.