NotFound [Error]: Not found 404

dor.blayzer@Dors-MacBook-Pro course % doc-builder preview course ../course/chapters/fr --not_python_module
Initial build docs for course ../course/chapters/fr /var/folders/v1/jsmj5_w55cx0xk4js5ywgfzm0000gn/T/tmpqpk4bez3/course/main/en
Building the MDX files: 100%|███████████████████████████████████████████████████████████████████████████| 94/94 [00:00<00:00, 1229.33it/s]
Installing node dependencies

Watching for changes in: /Users/dor.blayzer/Projects/course/../course

> kit@0.0.1 dev
> npm run custom-svelte-client && vite dev

> kit@0.0.1 custom-svelte-client
> node ./svelteKitCustomClient/replace

Forced re-optimization of dependencies

VITE v4.5.2 ready in 479 ms

➜ Local: http://localhost:5173/
➜ Network: use --host to expose
➜ press h to show help
NotFound [Error]: Not found: /chapter0/1
at resolve (/private/var/folders/v1/jsmj5_w55cx0xk4js5ywgfzm0000gn/T/tmpqpk4bez3/kit/node_modules/@sveltejs/kit/src/runtime/server/respond.js:483:13)
at resolve (/private/var/folders/v1/jsmj5_w55cx0xk4js5ywgfzm0000gn/T/tmpqpk4bez3/kit/node_modules/@sveltejs/kit/src/runtime/server/respond.js:277:5)
at #options.hooks.handle (/private/var/folders/v1/jsmj5_w55cx0xk4js5ywgfzm0000gn/T/tmpqpk4bez3/kit/node_modules/@sveltejs/kit/src/runtime/server/index.js:49:56)
at Module.respond (/private/var/folders/v1/jsmj5_w55cx0xk4js5ywgfzm0000gn/T/tmpqpk4bez3/kit/node_modules/@sveltejs/kit/src/runtime/server/respond.js:274:40) {
status: 404
}