You may need an appropriate loader to handle this file type, currently no loaders are configured to

Vue Cli 4.5.13构建Vue3项目出现无法启动

You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| }
| class RefImpl {
>     _rawValue;
|     _shallow;
|     _value;