Cannot read property 'getFullYear' of undefined

[wdz930]

点击的时候报错
vue.min.js:7 TypeError: Cannot read property 'getFullYear' of undefined
at a.get (VM429 vue-datepicker-local.js:6)
at a.n [as get] (vue.min.js:6)
at a.data (VM429 vue-datepicker-local.js:6)
at Ee (vue.min.js:6)
at Se (vue.min.js:6)
at a.Re.e._init (vue.min.js:6)
at new a (vue.min.js:6)
at K (vue.min.js:6)
at q (vue.min.js:6)
at s (vue.min.js:6)

能帮忙看下是什么问题造成的吗
vue 2.1.1 是通过script标签引入的