这到底是什么问题呢？
PS C:\Users\Administrator\Downloads\vue-element-admin-4.4.0> npm install -g @vue/cli
npm WARN config global --global, --local are deprecated. Use --location=global instead.
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated source-map-url@0.4.1: See https://github.com/lydell/source-map-url#deprecated
npm WARN deprecated source-map-resolve@0.5.3: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated subscriptions-transport-ws@0.11.0: The subscriptions-transport-ws package is no longer maintained. We recommend you use graphql-ws instead. For help migrating Apollo software to graphql-ws,
see https://www.apollographql.com/docs/apollo-server/data/subscriptions/#switching-from-subscriptions-transport-ws For general help using graphql-ws, see https://github.com/enisdenjo/graphql-ws/blob/master/README.md
npm ERR! Cannot read properties of null (reading ‘package’)

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Administrator\AppData\Local\npm-cache_logs\2022-07-17T02_50_09_421Z-debug-0.log