Google App Engine Deploy error 13 - Deployment Manager operation failed - google-app-engine

Question

I am trying to deploy an app first time and getting this at the very end of 'gcloud app deploy' operation.
ERROR: (gcloud.app.deploy) Error Response: [13] Deployment Manager operation failed, name: operation-1522364367335-5689513556e59-0732922b-1662dc1e, error:
[
{
"code":"RESOURCE_ERROR",
"location":"/deployments/aef-default-20180329t155754/resources/aef-default-20180329t155754-hcfw",
"message":{
"ResourceType":"compute.v1.firewall",
"ResourceErrorCode":"404",
"ResourceErrorMessage":{
"code":404,
"errors":[
{
"domain":"global",
"message":"The resource 'projects/kubernetes-staging/global/networks/default' was not found",
"reason":"notFound"
}
],
"message":"The resource 'projects/kubernetes-staging/global/networks/default' was not found",
"statusMessage":"Not Found",
"requestPath":"https://www.googleapis.com/compute/v1/projects/kubernetes-staging/global/firewalls",
"httpMethod":"POST"
}
}
},
{
"code":"RESOURCE_ERROR",
"location":"/deployments/aef-default-20180329t155754/resources/aef-default-20180329t155754-00it",
"message":{
"ResourceType":"compute.v1.instanceTemplate",
"ResourceErrorCode":"404",
"ResourceErrorMessage":{
"code":404,
"errors":[
{
"domain":"global",
"message":"The resource 'projects/kubernetes-staging/global/networks/default' was not found",
"reason":"notFound"
}
],
"message":"The resource 'projects/kubernetes-staging/global/networks/default' was not found",
"statusMessage":"Not Found",
"requestPath":"https://www.googleapis.com/compute/v1/projects/kubernetes-staging/global/instanceTemplates",
"httpMethod":"POST"
}
}
}
]

Answer 1

As the error states, the default global network (entitled 'default') hasn't been found, which appears to be the reason why your app isn't deploying.
You can create a global network by executing this command in Cloud Shell before deploying your app:
$ gcloud compute networks create default --subnet-mode auto
If you didn't modify the original default network, it would suggest that the issue is related to the network settings in your app.yaml configuration file. Information on configuring these settings can be found here.
If you follow the steps above but are still having trouble, I suggest that you create a new issue in the Public Issue Tracker and provide us with the contents of your app.yaml file as well as your Project ID, where I'd be happy to investigate further.
(Disclaimer: I work for Google Cloud Platform Support)