Exception in rendering!

Message: Cannot read property 'index' of null

TypeError: Cannot read property 'index' of null
    at <anonymous>:36:1098849
    at Array.map (<anonymous>)
    at n.value (<anonymous>:36:1098742)
    at n.value (<anonymous>:36:1099955)
    at n.value (<anonymous>:36:1105061)
    at a (<anonymous>:36:656061)
    at _e (<anonymous>:36:656338)
    at e.t.render (<anonymous>:36:658862)
    at e.t.read (<anonymous>:36:658435)
    at Object.renderToString (<anonymous>:36:663665)