vue 安装less和less-loader后报错

报错如下：

 ERROR  Failed to compile with 1 error                                                                                                       

 error  in ./src/components/Login.vue?vue&type=style&index=0&id=ef68022e&lang=less&scoped=true&

Syntax Error: TypeError: this.getOptions is not a function

查阅资料后发现是 less-loader安装的版本过高
解决方案： 

1.npm uninstall less-loader
2.npm install less-loader@5.0.0