Prev / Next page in docs is not working as expected

[brc-dd]

It currently shows /installation as next page for all pages:

You seem to have file structure like

installation/
  - index.md
props/
  - modes/
    - index.md
...

You'll need to adjust themeConfig.sidebar in your vitepress settings to this (notice trailing slashes):

[
  {
    text: 'Getting Started',
    collapsed: false,
    items: [{ text: 'Installation', link: '/installation/' }],
  },
  {
    text: 'Props',
    collapsed: false,
    items: [
      { text: 'Modes', link: '/props/modes/' },
      { text: 'Modes configuration', link: '/props/modes-configuration/' },
      { text: 'General configuration', link: '/props/general-configuration/' },
      { text: 'Calendar configuration', link: '/props/calendar-configuration/' },
      { text: 'Time picker configuration', link: '/props/time-picker-configuration/' },
      { text: 'Formatting', link: '/props/formatting/' },
      { text: 'Localization', link: '/props/localization/' },
      { text: 'Positioning', link: '/props/positioning/' },
      { text: 'Keyboard', link: '/props/keyboard/' },
      { text: 'Look and feel', link: '/props/look-and-feel/' },
    ],
  },
  {
    text: 'Slots',
    collapsed: true,
    items: [
      { text: 'Components', link: '/slots/components/' },
      { text: 'Content', link: '/slots/content/' },
      { text: 'Trigger and input', link: '/slots/trigger-and-input/' },
      { text: 'Icons', link: '/slots/icons/' },
      { text: 'Overlay', link: '/slots/overlay/' },
    ],
  },
  {
    text: 'Methods and events',
    collapsed: true,
    items: [
      { text: 'Methods', link: '/methods-and-events/methods/' },
      { text: 'Events', link: '/methods-and-events/events/' },
    ],
  },
  {
    text: 'Customization',
    collapsed: true,
    items: [{ text: 'Theming', link: '/customization/theming/' }],
  },
  {
    text: 'Migration guides',
    collapsed: true,
    items: [
      { text: 'Migrating from v8', link: '/migration/from-v8/' },
      { text: 'Migrating from v7', link: '/migration/from-v7/' },
      { text: 'Migrating from v6', link: '/migration/from-v6/' },
      { text: 'Migrating from v5', link: '/migration/from-v5/' },
    ],
  },
]

---

PS: You probably don't need this structure. If you're keeping things as /foo/index.md instead of just /foo.md to have clean urls like /foo/ instead of /foo.html, you can just enable cleanUrls: true in vitepress config which will remove .html prefix (though you won't get trailing slashes 👀).