Serenity Execute on multiple environment with gradle

[PreethiJeevi]

Attached is serenity.conf and serenity.properties file.

serenity.conf.txt
serenity.properties.txt

Below error is displayed.

Step failed
net.serenitybdd.core.environment.UndefinedEnvironmentVariableException: Environment 'env' property undefined for environment '[]'
at net.serenitybdd.core.environment.EnvironmentSpecificConfiguration.lambda$getProperty$7(EnvironmentSpecificConfiguration.java:141)
at java.base/java.util.Optional.orElseThrow(Optional.java:403)
at net.serenitybdd.core.environment.EnvironmentSpecificConfiguration.getProperty(EnvironmentSpecificConfiguration.java:137)
at com.essentracomponenet.serenity.util.PropertyHelper.getEnvironment(PropertyHelper.java:53)
at com.essentracomponenet.serenity.config.LaHook.preProdAuthHandler(LaHook.java:606)

but the same configuration works with maven.