webpack 4.1.1 打包css 问题求助

Question

@charset "UTF-8";
html{margin:0;padding:0;border:0}
body,h1,h2,h3,h4,h5,h6,p,dl,dt,dd,ul,ol,li,form,fieldset,button,input,textarea,div{ font-weight: normal;margin:0; padding:0;list-style:none;}
body{font:14px 'Microsoft Yahei', '微软雅黑', 5b8b4f53, Tahoma, Arial;background:#fff}
table{border-collapse:separate;border-spacing:0}
fieldset,img{border:none;display:block}
button,.button{cursor:pointer}
button,input,textarea,h1,h2,h3,h4,h5,h6{font-family:'Microsoft Yahei','微软雅黑',5b8b4f53,Tahoma,Arial!important; font-weight:normal}
:focus{outline:0;*blr:expression(this.onFocus=this.blur())}
a:link,a:visited{color:#333;text-decoration:none;*blr:expression(this.onFocus=this.blur())}

webpack4.1 预编译css的时候，总是提示如下错误，有什么解决方法没有？