Exception in rendering!

Message: Cannot read property 'id' of null

TypeError: Cannot read property 'id' of null
    at <anonymous>:8648:59
    at <anonymous>:8652:16
    at RelatedContentsList.render (<anonymous>:8655:10)
    at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (<anonymous>:114337:30)
    at ReactCompositeComponentWrapper._renderValidatedComponent (<anonymous>:114360:32)
    at ReactCompositeComponentWrapper.performInitialMount (<anonymous>:113900:30)
    at ReactCompositeComponentWrapper.mountComponent (<anonymous>:113796:21)
    at Object.mountComponent (<anonymous>:11427:35)
    at ReactDOMComponent.mountChildren (<anonymous>:117213:44)
    at ReactDOMComponent._createContentMarkup (<anonymous>:115098:32)