Sidebar doesn't have anything to be linked to

Symptom

[WARNING] No docs found in "build-log": can't auto-generate a sidebar.
[ERROR] Error: Unable to build website for locale ko.
  [cause]: Error: Docusaurus static site generation failed for 4 paths:
  - "/SecureNomad/404.html"
  - "/SecureNomad/it/overview"
  - "/SecureNomad/security/overview"
  - "/SecureNomad/"
    [cause]: Error: DocSidebarNavbarItem: Sidebar with ID "buildSidebar"
             doesn't have anything to be linked to.

Cause

A navbar item pointed to buildSidebar, which was auto-generated from the docs/build-log folder, but no documents were found in that folder. Because the navbar with nothing to link to appears at the top of every page, generation of every page failed.

Fix

Created at least one .md document in docs/build-log/.

Things to check:

• The folder is inside docs (not created at the project root)
• The folder name exactly matches dirName in sidebars.js
• The file extension is .md (not .md.txt)
• The file is saved in VS Code (Ctrl + S; watch for the ● on the tab)

Takeaway

When adding a menu, create it in this order: folder + one doc → sidebars.js → navbar. When removing a menu, delete the entries in both the navbar and sidebars.js.