Vue项目树形控件node-click事件控制台报错Invalid handler for event "node-click": got undefined

[qq_35393490]

vue.esm.js?efeb:591 [Vue warn]: Invalid handler for event "node-click": got undefined

found in

---> <ElTree> at packages/tree/src/tree.vue
<Category> at src\views\modules\common\category.vue
<ElCol>
<ElRow>
<Attrgroup> at src\views\modules\product\attrgroup.vue
<ElCard> at packages/card/src/main.vue
<ElTabPane> at packages/tabs/src/tab-pane.vue
<ElTabs> at packages/tabs/src/tabs.vue
<MainContent> at src\views\main-content.vue
<Main> at src\views\main.vue
<App> at src\App.vue
<Root>