【报Bug】添加@unocss/webpack依赖后会导致直接启动报错

操作步骤：

1、使用命令行创建项目

vue create -p dcloudio/uni-preset-vue my-project

选择默认模板

2、添加@unocss/webpack依赖

pnpm add @unocss/webpack -D

3、启动项目：

pnpm serve

预期结果：

成功启动项目

实际结果：

启动报错，提示：

 ERROR  TypeError: Cannot convert undefined or null to object  
TypeError: Cannot convert undefined or null to object  
    at Function.assign (<anonymous>)  
    at D:\project\uniapp\my-project\node_modules\.pnpm\@dcloudio+vue-cli-plugin-uni@2.0.2-4040520250103001_copy-webpack-plugin@13.0.0_postcss@8.5.3\node_modules\@dcloudio\vue-cli-plugin-uni\lib\chain-webpack.js:53:34  
    at Object.tap (D:\project\uniapp\my-project\node_modules\.pnpm\webpack-chain@6.5.1\node_modules\webpack-chain\src\Use.js:14:20)  
    at D:\project\uniapp\my-project\node_modules\.pnpm\@dcloudio+vue-cli-plugin-uni@2.0.2-4040520250103001_copy-webpack-plugin@13.0.0_postcss@8.5.3\node_modules\@dcloudio\vue-cli-plugin-uni\lib\chain-webpack.js:53:12  
    at Array.forEach (<anonymous>)  
    at D:\project\uniapp\my-project\node_modules\.pnpm\@dcloudio+vue-cli-plugin-uni@2.0.2-4040520250103001_copy-webpack-plugin@13.0.0_postcss@8.5.3\node_modules\@dcloudio\vue-cli-plugin-uni\lib\chain-webpack.js:22:17  
    at D:\project\uniapp\my-project\node_modules\.pnpm\@vue+cli-service@5.0.8_vue-template-compiler@2.6.14_vue@2.6.14\node_modules\@vue\cli-service\lib\Service.js:268:40  
    at Array.forEach (<anonymous>)  
    at Service.resolveChainableWebpackConfig (D:\project\uniapp\my-project\node_modules\.pnpm\@vue+cli-service@5.0.8_vue-template-compiler@2.6.14_vue@2.6.14\node_modules\@vue\cli-service\lib\Service.js:268:26)  
    at Service.resolveWebpackConfig (D:\project\uniapp\my-project\node_modules\.pnpm\@vue+cli-service@5.0.8_vue-template-compiler@2.6.14_vue@2.6.14\node_modules\@vue\cli-service\lib\Service.js:272:48)  
    at PluginAPI.resolveWebpackConfig (D:\project\uniapp\my-project\node_modules\.pnpm\@vue+cli-service@5.0.8_vue-template-compiler@2.6.14_vue@2.6.14\node_modules\@vue\cli-service\lib\PluginAPI.js:132:25)  
    at serve (D:\project\uniapp\my-project\node_modules\.pnpm\@dcloudio+vue-cli-plugin-uni@2.0.2-4040520250103001_copy-webpack-plugin@13.0.0_postcss@8.5.3\node_modules\@dcloudio\vue-cli-plugin-uni\commands\serve.js:51:31)  
    at Service.run (D:\project\uniapp\my-project\node_modules\.pnpm\@vue+cli-service@5.0.8_vue-template-compiler@2.6.14_vue@2.6.14\node_modules\@vue\cli-service\lib\Service.js:262:12)  
    at processTicksAndRejections (node:internal/process/task_queues:96:5)  
 ELIFECYCLE  Command failed with exit code 1.