Exception in rendering!

Message: Cannot read property 'id' of null

TypeError: Cannot read property 'id' of null
    at <anonymous>:8573:59
    at <anonymous>:8577:16
    at RelatedContentsList.render (<anonymous>:8612:10)
    at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (<anonymous>:113400:30)
    at ReactCompositeComponentWrapper._renderValidatedComponent (<anonymous>:113423:32)
    at ReactCompositeComponentWrapper.performInitialMount (<anonymous>:112963:30)
    at ReactCompositeComponentWrapper.mountComponent (<anonymous>:112859:21)
    at Object.mountComponent (<anonymous>:11409:35)
    at ReactDOMComponent.mountChildren (<anonymous>:116276:44)
    at ReactDOMComponent._createContentMarkup (<anonymous>:114161:32)