Exception in rendering!

Message: Cannot read property 'id' of null

TypeError: Cannot read property 'id' of null
    at <anonymous>:8605:59
    at <anonymous>:8609:16
    at RelatedContentsList.render (<anonymous>:8612:10)
    at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (<anonymous>:113418:30)
    at ReactCompositeComponentWrapper._renderValidatedComponent (<anonymous>:113441:32)
    at ReactCompositeComponentWrapper.performInitialMount (<anonymous>:112981:30)
    at ReactCompositeComponentWrapper.mountComponent (<anonymous>:112877:21)
    at Object.mountComponent (<anonymous>:11409:35)
    at ReactDOMComponent.mountChildren (<anonymous>:116294:44)
    at ReactDOMComponent._createContentMarkup (<anonymous>:114179:32)