The share error message meaning that you’re having a temporary resource stock-out issue in that particular zone. I would like to point you to this post made by "Paul Nash" on 4/18/17, who thoroughly explained the resource stock-out issue at Google Cloud Platform (GCP).
As a workaround, I would recommend that you try a different zone or to try later if you are looking to get resources in the same zone as those issues are to be expected transiently.
We also recommend deploying and balancing your workload across multiple zones or regions to reduce the likelihood of an outage. For more details visit the following link. Please review the documentation which outlines how to build resilient and scalable architectures on Google Cloud Platform.
Again, we want to offer our sincerest apologies. We are working hard to resolve this and make this an exceptionally rare event.
