Cause
java.lang.RuntimeException: Error rendering template for decorator root
    at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:232)

caused by: java.lang.RuntimeException: Error rendering template for decorator page
    at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:232)

caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getDisplayableLabel' in class
 com.atlassian.confluence.plugin.descriptor.web.model.ConfluenceWebLabel threw exception com.atlassian.core.exception.InfrastructureException: 
Error occurred rendering template content @ /decorators/includes/content-navigation.vm[2,36]
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:286)

caused by: com.atlassian.core.exception.InfrastructureException: Error occurred rendering template content
    at com.atlassian.confluence.util.velocity.VelocityUtils.getRenderedContent(VelocityUtils.java:132)

caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getLatestVersionsOfAttachments' in class
 com.atlassian.confluence.pages.Page threw exception net.sf.hibernate.LazyInitializationException: 
Failed to lazily initialize a collection @ getRenderedContent[1,15]
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:286)

caused by: net.sf.hibernate.LazyInitializationException: Failed to lazily initialize a collection
    at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:201)

caused by: net.sf.hibernate.HibernateException: collection was evicted
    at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3305)