Exception in rendering!

Message: Cannot read property 'index' of null

TypeError: Cannot read property 'index' of null
    at <anonymous>:36:1009829
    at Array.map (<anonymous>)
    at n.value (<anonymous>:36:1009722)
    at n.value (<anonymous>:36:1010935)
    at n.value (<anonymous>:36:1014613)
    at a (<anonymous>:36:361369)
    at _e (<anonymous>:36:361646)
    at e.t.render (<anonymous>:36:364170)
    at e.t.read (<anonymous>:36:363743)
    at Object.renderToString (<anonymous>:36:368973)