I found the problem, And I will answer my own question because maybe
someone could be with the same problem...
I tried to deploy after this error and do some changes, but I was after
that this error:
gcloud app deploy --promote
File upload done. Updating service [default]...failed. ERROR:
This could be due to a number of reasons. I would recommend you to check
your logs which will provide you with more information about what’s causing
the issue. You can check your logs by going on App Engine> Versions> Tools
(under diagnose) -> logs.
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You received this message because you a
