使用npm 启动小程序项目时》报错

 ERROR  TypeError: Cannot convert undefined or null to object

TypeError: Cannot convert undefined or null to object

    at Function.assign (<anonymous>)

    at /Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/lib/chain-webpack.js:53:34

    at Object.tap (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/webpack-chain/src/Use.js:14:20)

    at /Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/lib/chain-webpack.js:53:12

    at Array.forEach (<anonymous>)

    at /Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/lib/chain-webpack.js:22:17

    at /Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@vue/cli-service/lib/Service.js:268:40

    at Array.forEach (<anonymous>)

    at Service.resolveChainableWebpackConfig (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@vue/cli-service/lib/Service.js:268:26)

    at PluginAPI.resolveChainableWebpackConfig (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@vue/cli-service/lib/PluginAPI.js:145:25)

    at module.exports (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@vue/cli-service/lib/commands/build/resolveAppConfig.js:9:22)

    at getWebpackConfig (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/commands/build.js:89:88)

    at getWebpackConfigs (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/commands/build.js:122:13)

    at build (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/commands/build.js:161:26)

    at /Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@dcloudio/vue-cli-plugin-uni/commands/build.js:80:11

    at Service.run (/Users/apple/meili/wang.li_dacs_at_bmsoft.com.cn/143/Desktop/北明软件/program/shenzhen-arbitration-uniapp/node_modules/@vue/cli-service/lib/Service.js:262:12)

    at processTicksAndRejections (internal/process/task_queues.js:93:5)

使用yarn也同样报错

使用cnpm也同样报错