Uncaught TypeError: Cannot read property 'components' of undefined

[wei-kris]

hello ， I had a error when I dragged a wiget

Uncaught TypeError: Cannot read property 'components' of undefined at Store.eval (index.js?e9c9:64) at wrappedMutationHandler (/Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:699) at commitIterator (/Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:391) at Array.forEach () at /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:390 at Store._withCommit (/Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:497) at Store.commit (/Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:389) at boundCommit (/Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:337) at Store.addComponent (index.js?e9c9:142) at Array.wrappedActionHandler (/Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:706) (anonymous) @ index.js?e9c9:64 wrappedMutationHandler @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:699 commitIterator @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:391 (anonymous) @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:390 _withCommit @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:497 commit @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:389 boundCommit @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:337 addComponent @ index.js?e9c9:142 wrappedActionHandler @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:706 dispatch @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:428 boundDispatch @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:334 mappedAction @ /Users/luonan/Documents/vue/vue-design/node_modules/vuex/dist/vuex.common.js:882 handleDrop @ WireframePane.vue?adbe:87 invoker @ vue.esm.js?efeb:2027 fn._withTask.fn._withTask @ vue.esm.js?efeb:1826