Improve error messages around undefined site sections.

[emmerich]

Improve error handling and messaging around undefined site spaces and sections.

[changeset-bot]

🦋 Changeset detected

Latest commit: 5bf99cf

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
gitbook-v2	Patch

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[github-actions]

Summary of the deployments:

Version 1

Version	URL	Status
Latest commit	https://7515be29.gitbook-open.pages.dev	✅
PR	https://pr3179.gitbook-open.pages.dev	✅

Version 2

Version	URL	Status
Vercel	https://gitbook-v2-29sp94diq-gitbook.vercel.app	✅
Cloudflare	https://7be5f009-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	v1	2v	2c
GitBook	https://7515be29.gitbook-open.pages.dev/docs.gitbook.com	https://gitbook-v2-29sp94diq-gitbook.vercel.app/url/docs.gitbook.com	https://7be5f009-gitbook-open-v2-preview.gitbook.workers.dev/url/docs.gitbook.com
E2E	https://7515be29.gitbook-open.pages.dev/gitbook.gitbook.io/test-gitbook-open	https://gitbook-v2-29sp94diq-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://7be5f009-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v1 (Inspect)	👍 Changes approved	2 changed	Apr 23, 2025, 11:41 AM
customers-v2 (Inspect)	👍 Changes approved	81 changed	Apr 23, 2025, 11:45 AM
default (Inspect)	👍 Changes approved	1 changed	Apr 23, 2025, 11:43 AM
v2-vercel (Inspect)	✅ No changes detected	-	Apr 23, 2025, 11:46 AM