# X_DEV_ROOT_GONE

## Means

the app root x dev serves was deleted or moved

## Typical cause

the directory x dev was started in was removed or renamed while it ran (a test fixture torn down, a re-clone, mv of the checkout)

## Fix

x dev   # from the app root, once it exists again (restored, re-cloned or moved back)

[CLI and verify](/error-codes#cli-and-verify)