I failed to start my instance (through the web browser), it gave me the error:
\"The zone \'projects/XXXXX/zones/europe-west4-b\' does not have enoug
To have a more up to date answer, today I had the same issue with the zone us-central1-a. I was getting the error message "The zone 'projects//zones/us-central1-a' does not have enough resources available to fulfill the request. '(resource type:compute)'.". Fortunatelly the error was overcome by just waiting 5 minutes and trying again.