btcserver-googlecloud deployment resource error (network)

https://github.com/btcpayserver/btcpayserver-googlecloud/blob/dbd47b846af4b4e8aca04032581efbcd52eaeca3/vm.jinja#L26

When I attempt to deploy this template with cloud shell (to us-west1-c), I receive the following error:

> ERROR: (gcloud.deployment-manager.deployments.create) Error in Operation [redacted]: errors:
> code: RESOURCE_ERROR
> location: /deployments/redacted/resources/redacted-vm
> message: "{\"ResourceType\":\"compute.v1.instance\",\"ResourceErrorCode\":\"400\"\
> ,\"ResourceErrorMessage\":{\"code\":400,\"errors\":[{\"domain\":\"global\",\"\
> message\":\"Invalid value for field 'resource.networkInterfaces[0].network': ''.\
> \ The referenced network resource cannot be found.\",\"reason\":\"invalid\"}],\"\
> message\":\"Invalid value for field 'resource.networkInterfaces[0].network': ''.\
> \ The referenced network resource cannot be found.\",\"statusMessage\":\"Bad Request\"\
> ,\"requestPath\":\"https://compute.googleapis.com/compute/v1/projects/redacted/zones/us-west1-c/instances\"\
> ,\"httpMethod\":\"POST\"}}"
>

Start with vm.jinja at line 26 and compare the network configuration used by the compute.v1.instance resource with the deployment context. Reproduce the template deployment from Cloud Shell in us-west1-c and use the reported networkInterfaces error to guide the investigation. Done means the deployment completes without the referenced network resource error.

Written by the indexing model from the issue text.