Im new to hibernate, and not quite sure what is wrong with my application. So i have these 2 modules: Core and Website.
You don't need to remove logback-classic.jar, Instead the root cause seems to be the missing definition for org.hibernate.validator.internal.engine.ConfigurationImpl As per Google, you need to include http://mvnrepository.com/artifact/org.hibernate/hibernate-validator If its a maven project then the below config in your pom dependencies shall make things work smooth for you
org.hibernate
hibernate-validator
5.2.4.Final