Hi @johnsmith0815,
Thank you for the report.
That error is related with an outdated version on yarn.lock. We are aware of this issue, we should push an updated version of yarn.lock soon.
In the meantime, please try deleting yarn.lock and running yarn install again. Then the other yarn run commands described on the documentation.
I won’t be available the next few days. Please ping @Mac-Rae
@Mac-Rae @c.panton we should add a note on the docs while the fix is not pushed