# X_PIPELINE_FINALIZE_FAILED

## Means

a finalize stage threw instead of finishing the response

## Typical cause

the response cannot take the headers the pipeline puts on it — a `Response.redirect()`, or a frozen or proxied `Response` a handler returned. `handle()` answers this 500 rather than rejecting, and the `cause` names the stage

## Fix

return a Response built here — `jsonResponse()`, `textResponse()`, `html()` or `redirect()` from `@ultimat3/http`

[HTTP](/error-codes#http)