Exception in rendering!

Message: Cannot read property 'toLowerCase' of null

TypeError: Cannot read property 'toLowerCase' of null
    at <anonymous>:36:29968
    at Array.find (native)
    at Object.g (<anonymous>:36:29936)
    at O (<anonymous>:36:226636)
    at x (<anonymous>:36:225594)
    at <anonymous>:36:148249
    at e.render (<anonymous>:36:148890)
    at e.read (<anonymous>:36:147593)
    at Object.renderToString (<anonymous>:36:151939)
    at t.default (<anonymous>:36:162633)