P.S. A common problem that's easy to run into is uploading too many files. It occurs if you retry and repeat upload process too many times. Try to do everything in one go, and have patience.
Happy Inventing,
Kanishka
ERROR: (gcloud.app) Invalid choice: 'upload'.Usage: gcloud app [optional flags] <group | command> group may be domain-mappings | firewall-rules | instances | logs | operations | regions | services | ssl-certificates | versions command may be browse | create | deploy | describe | open-console | update
For detailed information on this command and its flags, run: gcloud app --help
gcloud app upload
gcloud app deploy
Happy Inventing,
Kanishka
ERROR: (gcloud.app.deploy) Error [400] Operation does not satisfy the following requirements: billing-enabled {Billing must be enabled for activation of service '' in project 'costumtinywebdb' to proceed., https://console.developers.google.com/project/costumtinywebdb/settings}
Cheers,
Kanishka