# X_SCRAPE_DRIVER_UNKNOWN

## Means

no browser driver is installed for this run

## Typical cause

**terminal.** No `scrapeDriver` in `apps/<app>/runtime.ts` and the definition passed no `driver:`; `cause` lists what *is* installed, or `none`

## Fix

`apps/<app>/runtime.ts: export const runtime = { scrapeDriver: localBrowser() }` — or pass `driver: fakeBrowser()` on the `scrape()` definition

[Scraping](/error-codes#scraping)