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
Happened to me over the weekend when I wanted to swap the K80 to a new P100 instance.
Any instance created on other regions with the same zone identifier ('b', from europe-west1-b) produced this error as well.
Create a GPU instance on a different region and a different zone identifier ('a', 'c', 'd', ...). That's it.