在vue.config.js中配置了scss全局注入后运行到手机报错

const color = require("./common/color.js");  
function appScssVar(oldVarString) {  
  const newData = Object.keys(color)  
                            .map((k) => `$${k}: ${color[k]};`)  
                            .join("\n");  

  // 添加样式到全局，这样不用每个页面import了  
  if (!newData) {  
    return oldVarString;  
  }  
  return oldVarString + '\n' + newData;  
}  
module.exports = {  
    chainWebpack: (webpackConfig) => {  
            const cssTypes = ["vue-modules", "vue"];  
            cssTypes.forEach((type) => {  
                webpackConfig.module  
                    .rule("scss")  
                    .oneOf(type)  
                    .use("sass-loader")  
                    .tap((options) => {  
                    if(!options) options = {}  
                        if (!options.sassOptions) {  
                            options.sassOptions = {};  
                        }  
                        options.prependData = appScssVar(options.prependData)  
                        return options;  
                    });  
            });  
        },  
};

下面是报错：
ERROR Error: No loader specified
11:54:28.729 Error: No loader specified
11:54:28.729 at Function.normalizeUseItem (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:389:10)
11:54:28.758 at Function.normalizeUse (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:360:19)
11:54:28.767 at use.map (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:357:33)
11:54:28.767 at Array.map (<anonymous>)
11:54:28.795 at Function.normalizeUse (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:357:6)
11:54:28.796 at Function.normalizeRule (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:288:26)
11:54:28.824 at rules.map (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:110:20)
11:54:28.834 at Array.map (<anonymous>)
11:54:28.835 at Function.normalizeRules (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:109:17)
11:54:28.863 at Function.normalizeRule (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:300:28)
11:54:28.863 at rules.map (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:110:20)
11:54:28.892 at Array.map (<anonymous>)
11:54:28.923 at Function.normalizeRules (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:109:17)
11:54:28.923 at new RuleSet (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/RuleSet.js:104:24)
11:54:28.979 at VueLoaderPlugin.apply (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/@dcloudio/vue-cli-plugin-uni/packages/vue-loader/lib/plugin-webpack4.js:29:23)
11:54:29.009 at webpack (/Applications/HBuilderX.app/Contents/HBuilderX/plugins/uniapp-cli/node_modules/webpack/lib/webpack.js:51:13)