Exception in rendering!

Message: Cannot read property 'title' of null

TypeError: Cannot read property 'title' of null
    at AuthorSubscribe (<anonymous>:37:610820)
    at t.default (<anonymous>:37:72527)
    at t.default (<anonymous>:37:559216)
    at Object.serverRenderReactComponent (<anonymous>:37:392471)
    at <anonymous>:6:31
    at <anonymous>:13:11