Start Counter example fails on StackBlitz (linked from Build a Project from Scratch)

Which project does this relate to?

Router

Describe the bug

On https://tanstack.com/start/latest/docs/framework/react/build-from-scratch, “Here is what that will look like” links to https://stackblitz.com/github/tanstack/router/tree/main/examples/react/start-counter. It seems to build successfully, but shows the error No Start context found in AsyncLocalStorage. Make sure you are using the function within the server runtime.:

Complete minimal reproducer

https://stackblitz.com/github/tanstack/router/tree/main/examples/react/start-counter

Steps to Reproduce the Bug

1. Visit https://tanstack.com/start/latest/docs/framework/react/build-from-scratch
2. Click “Here is what that will look like”
3. Wait for the build to finish

Expected behavior

I expected to see the counter, not an error.

Screenshots or Videos

No response

Platform

• Router / Start Version: ^1.170.8 / ^1.168.11
• OS: macOS
• Browser: Brave
• Browser Version: 1.90.124
• Bundler: vite
• Bundler Version: ^8.0.0

Additional context

This issue is not stopping me in any way, just thought I’d help the next guy :)

Start by opening the Build a Project from Scratch page and the examples/react/start-counter entry linked in the issue, then reproduce the failure in StackBlitz. Trace why the example reports that no Start context is found in AsyncLocalStorage. Done means the linked StackBlitz project builds and displays the counter instead of the error.