I got the below error, when I tried to deploy my GAE app through gcloud.
Updating service [default]...failed.
gcloud app deploy
writes a log file, and tells you where that log is early in its output. Examine that log. It'll tell you what's being uploaded.
Two common ways I've seen people get into trouble are
venv
(or .venv
, if that's the name you picked) to skip_files
..git
to skip_files