示例代码片段：https://developers.weixin.qq.com/s/1GPX7jmG78dz

告辞：解决

"mp-navigation-bar": "/weui-miniprogram/navigation-bar/navigation-bar",

改成：去掉 "/"

"mp-navigation-bar": "weui-miniprogram/navigation-bar/navigation-bar",

如果还不行就更新一下开发者工具版本