I did a really silly thing a while ago, which was to delete my default VPC in AWS. This didn’t affect me until recently as I have custom VPC’s which I was launching EC2 instances into. The problem arose when I tried to run the beta of cloud former which tries to by default spin up a EC2 instance in the default VPC.
I don’t really have a need for a developer support subscription, but I found out that this is a common problem and posting on the AWS forums, they will happily recreate a default VPC for you.
I’ve learnt my lesson though, never delete the default of anything!