Exception in rendering!

Message: Cannot read property 'replace' of undefined

TypeError: Cannot read property 'replace' of undefined
    at y (<anonymous>:121:22289)
    at _constructComponentWithoutOwner (<anonymous>:63:31931)
    at _constructComponent (<anonymous>:63:31785)
    at mountComponent (<anonymous>:63:30950)
    at Object.mountComponent (<anonymous>:48:12534)
    at h.mountChildren (<anonymous>:63:25955)
    at h._createContentMarkup (<anonymous>:62:18977)
    at h.mountComponent (<anonymous>:62:17571)
    at Object.mountComponent (<anonymous>:48:12534)
    at performInitialMount (<anonymous>:64:720)
    at mountComponent (<anonymous>:63:31626)