More helpful prerender error message

[Tobbe]

Fixes #6239

Before:

After:

[nx-cloud]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit 12bc345. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

---

✅ Successfully ran 14 targets

• cli run test --concurrency 2 -- --colors --maxWorkers 2
• cli run test --concurrency 2 -- --colors --maxWorkers 2
• cli run build
• cli run build
• cli run build
• cli run build
• cli run test --concurrency 2 -- --colors --maxWorkers 2
• cli run test --concurrency 2 -- --colors --maxWorkers 2
• cli run build
• cli run build
• cli run build
• cli run build
• cli run build
• cli run build

---

Sent with 💌 from NxCloud.

[netlify]

✅ Deploy Preview for redwoodjs-docs canceled.

Name	Link
🔨 Latest commit	12bc345
🔍 Latest deploy log	https://app.netlify.com/sites/redwoodjs-docs/deploys/63039889f7ab36000ae4a3d5