Missing front end not fixed in 2.7.1.1

[francisjervis]

Describe the bug
FileNotFoundError(f"{local_target} built UI dir not found")

See #2425 which is clearly not resolved.

To Reproduce
Follow steps in CONTRIBUTING.md

Expected behavior
The package works.

Screenshots

[hayescode]

@francisjervis run pnpm run buildUi in the root. CONTRIBUTING.md updated in #2451