[Vuejs]-VuePress Sidebar does not render

This is the solution:

     sidebar: [
        '/',
        {
            title: 'Guide',
            collapsable: false,
            children: [ 
            ['/guide/Frontend','Frontend'],
            ['/guide/Backend' , 'Backend' ]

        },

Explanation:

 ['/guide/Frontend','Frontend'],

the '/guide/Frontend' is the path, the 'Frontend' (you can name it whatever you want) is what you want to call it in the sidebar so the sidebar title doesn’t have to be read in ‘absolute path’ format.