TypeError: Cannot convert undefined or null to object

12:00:45.063 App running at:
12:00:45.063 - Local: http://localhost:8080/
12:00:45.125 - Network: http://192.168.31.197:8080/
12:00:45.141 项目 'fex-wallet-app' 编译成功。前端运行日志，请另行在浏览器的控制台查看。
12:00:45.141 H5版常见问题参考: https://ask.dcloud.net.cn/article/35232
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12:00:46.256 App Show
12:00:46.456 [system]TypeError: Cannot convert undefined or null to object
at slice (<anonymous>)
at Function.success (webpack-internal:///./node_modules/babel-loader/lib/index.js!./node_modules/@dcloudio/vue-cli-plugin-uni/packages/webpack-preprocess-loader/index.js?!./node_modules/@dcloudio/vue-cli-plugin-uni/packages/webpack-preprocess-loader/index.js?!./node_modules/@dcloudio/vue-cli-plugin-uni/packages/webpack-uni-app-loader/using-components.js!./node_modules/@dcloudio/vue-cli-plugin-uni/packages/vue-loader/lib/index.js?!./node_modules/@dcloudio/vue-cli-plugin-uni/packages/webpack-scoped-loader/index.js!E:\myim\liaoqifeng-fexcoin_1.0.0\fex-wallet-app\pages\index\index.vue?vue&type=script&lang=js&:306:32)
at http://localhost:8080/static/js/chunk-vendors.js:98:81240
at Object.I [as callback] (http://localhost:8080/static/js/chunk-vendors.js:98:84049)
at b (http://localhost:8080/static/js/chunk-vendors.js:98:84886)
at XMLHttpRequest.k.onload (http://localhost:8080/static/js/chunk-vendors.js:98:53638)

不知道怎么排查，项目不影响就是报这个错误。