I don't know exactly what the problem was, but I solved it removing everything and did the setup again. I guess in my case it was because of the NPM and YARN pkgmanagers I think somehow I mixed them while installing and the setup wasn't properly finished. So after that the process worked like a charm ;)
f.roschel você chegou a descobrir o que causou esse problema? Porque estou tentando o mesmo problema tentando rodar o checkout-ui-custom mas não está indo.
09:25:35.492 - error: App build failed with message: Couldn’t parse app identifier
09:25:35.504 - error: Error while retrieving list of versions for app . vtex.builder-hub@0.284.0
09:25:35.519 - error: Request failed with status code 400 vtex.builder-hub@0.284.0
yo tuve el mismo problema , pero era por que el nombre del vendor estaba diferente a como lo tenia en el admin , estaba con el nombre de la cuenta cambie eso y levanto