vue使用vue-element-admin报错：

vue.runtime.esm.js?2b0e:619 [Vue warn]: Error in nextTick: "TypeError: Cannot read properties of undefined (reading 'key')"

vue.runtime.esm.js?2b0e:1888 TypeError: Cannot read properties of undefined (reading 'key')
    at checkDuplicateKeys (vue.runtime.esm.js?2b0e:6237:1)
    at createChildren (vue.runtime.esm.js?2b0e:6044:1)
    at createElm (vue.runtime.esm.js?2b0e:5948:1)
    at VueComponent.patch [as __patch__] (vue.runtime.esm.js?2b0e:6471:1)
    at Vue._update (vue.runtime.esm.js?2b0e:3939:1)
    at VueComponent.updateComponent (vue.runtime.esm.js?2b0e:4060:1)
    at Watcher.get (vue.runtime.esm.js?2b0e:4473:1)
    at new Watcher (vue.runtime.esm.js?2b0e:4462:1)
    at mountComponent (vue.runtime.esm.js?2b0e:4067:1)
    at Vue.$mount (vue.runtime.esm.js?2b0e:8409:1)

backend.js:2428 Uncaught TypeError: Cannot read properties of undefined (reading 'fnContext')
    at captureChild (backend.js:2428:13)
    at Array.map (<anonymous>)
    at capture (backend.js:2511:40)
    at Array.map (<anonymous>)
    at capture (backend.js:2505:8)
    at Array.map (<anonymous>)
    at capture (backend.js:2505:8)
    at Array.map (<anonymous>)
    at capture (backend.js:2505:8)
    at Array.map (<anonymous>)

原因是：

<el-pagination
          layout="prev, pager, next"
          :total="page.total"
          :page-size="page.size"
          :current-page="page.page"
          @current-change="currentChange">
</el-pagination>

其中ayout="prev, pager, next"的pager拼写错了