res.writeHead is not a function

[AdelNorberg]

I switched from version 2 to version 3 and I have a critical problem.

Because of the proxy that I specified, my server breaks:

If I remove the proxy settings, then Vite will not crash

I found a PR that is responsible for this error in the console:
#7398

[sapphi-red]

This is a bug. Created a PR here 👍 : #9123