Navigation menu not showing

[x] I confirm that this is an issue rather than a question.

Bug report

Navigation bar menu doesn't show up

Steps to reproduce

Followed steps on the Get Started page to create a new site. Added to docs/.vuepress/config.js:


module.exports = {
  lang: 'en-US',
  title: 'Dave!',
  description: 'This is my first VuePress site',
  themeConfig: {
    nav: [
      { text: 'Home', link: '/' },
      { text: 'Guide', link: '/guide/' },
      { text: 'External', link: 'https://google.com' }
    ]
  }
}```
No menu shows. I've downloaded a site I made late last year that has a menu, but that also doesn't show, yet it shows on my live site.

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#### What is expected?
A navigation menu should show

#### What is actually happening?
The navigation menu isn't showing

#### Other relevant information
Tried it on a new site and an existing site (which is working live but not after cloning it locally).

- Output of `npx vuepress info` in my VuePress project:

  System:
    OS: macOS 12.4
    CPU: (8) arm64 Apple M1
    Memory: 87.72 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.15.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 8.12.1 - /usr/local/bin/npm
  Utilities:
    Git: 2.32.0 - /usr/bin/git
  Browsers:
    Chrome: 102.0.5005.61
    Edge: Not Found
    Firefox: 100.0.2
    Safari: 15.5
  npmPackages:
    @vuepress/bundler-vite:  2.0.0-beta.48 
    @vuepress/bundler-webpack: Not Found
    @vuepress/cli:  2.0.0-beta.48 
    @vuepress/client:  2.0.0-beta.48 
    @vuepress/core:  2.0.0-beta.48 
    @vuepress/markdown:  2.0.0-beta.48 
    @vuepress/plugin-active-header-links:  2.0.0-beta.48 
    @vuepress/plugin-back-to-top:  2.0.0-beta.48 
    @vuepress/plugin-container:  2.0.0-beta.48 
    @vuepress/plugin-docsearch: Not Found
    @vuepress/plugin-external-link-icon:  2.0.0-beta.48 
    @vuepress/plugin-git:  2.0.0-beta.48 
    @vuepress/plugin-google-analytics: Not Found
    @vuepress/plugin-medium-zoom:  2.0.0-beta.48 
    @vuepress/plugin-nprogress:  2.0.0-beta.48 
    @vuepress/plugin-palette:  2.0.0-beta.48 
    @vuepress/plugin-prismjs:  2.0.0-beta.48 
    @vuepress/plugin-pwa: Not Found
    @vuepress/plugin-pwa-popup: Not Found
    @vuepress/plugin-register-components: Not Found
    @vuepress/plugin-search: Not Found
    @vuepress/plugin-shiki: Not Found
    @vuepress/plugin-theme-data:  2.0.0-beta.48 
    @vuepress/plugin-toc: Not Found
    @vuepress/shared:  2.0.0-beta.48 
    @vuepress/theme-default:  2.0.0-beta.48 
    @vuepress/utils:  2.0.0-beta.48 
    vue:  3.2.37 
    vue-loader: Not Found
    vue-router:  4.0.16 
    vuepress: ^2.0.0-beta.48 => 2.0.0-beta.48 
    vuepress-vite:  2.0.0-beta.48 
    vuepress-webpack: Not Found

vuejs / vuepress

Navigation menu not showing #3055

Bug report

Steps to reproduce