uni-app 编译头条小程序失败，出现TypeError：Path must be a string. Received undefined

uni-app 编译头条小程序失败，出现TypeError：Path must be a string. Received undefined

| 开发环境 | 版本号 | 项目创建方式 |
|----------|--------|--------------|
| Mac      | Mac2020 | HBuilderX    |

# 操作步骤：

ERROR TypeError: Path must be a string. Received undefined
17:39:36.188 TypeError: Path must be a string. Received undefined
17:39:36.188 at assertPath (path.js:28:11)
17:39:36.195 at Object.relative (path.js:1252:5)
17:39:36.195 at Object.keys.forEach.name (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/@dcloudio/webpack-uni-mp-loader/lib/plugin/generate-component.js:158:52)
17:39:36.201 at Array.forEach (<anonymous>)
17:39:36.201 at generateComponent (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/@dcloudio/webpack-uni-mp-loader/lib/plugin/generate-component.js:76:25)
17:39:36.209 at Promise (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/@dcloudio/webpack-uni-mp-loader/lib/plugin/index-new.js:84:11)
17:39:36.210 at new Promise (<anonymous>)
17:39:36.217 at compiler.hooks.emit.tapPromise.compilation (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/@dcloudio/webpack-uni-mp-loader/lib/plugin/index-new.js:72:16)
17:39:36.225 at _next1 (eval at create (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:9:17)
17:39:36.232 at _err1 (eval at create (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:26:1)
17:39:36.241 at Promise.all.catch.then (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/copy-webpack-plugin/dist/index.js:91:9)
17:39:36.241 at <anonymous>

## 预期结果：

编译成功

## 实际结果：

编译失败
ERROR TypeError: Path must be a string. Received undefined
17:39:36.188 TypeError: Path must be a string. Received undefined

## bug描述：

抖音小程序编译 失败

![](https://www.itying.com/uniimg.php?url=https://img-cdn-tc.dcloud.net.cn/uploads/questions/20210312/961dc5d4a4e4c59c7f40324ebfb5db86.png)