I download google official latest python app engine demo and deploy with flex env, but this problem arises
size: 3458
DONE
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ERROR: (gcloud.app.deploy) FAILED_PRECONDITION: The App Engine service account does not exist for "my-project".
And I checked the IAM service-xxxxxxxxx@gae-api-prod.google.com.iam.gserviceaccount.com already exists. Someone can help me, please?
Solution: Someone delete default app engine account, just add it and it solved.