How do I fix the problem with pulumi saying that aws:region is not configured even though it is:

Diagnostics:
  aws:ec2:VpcPeeringConnection (vpc-peering-connection):
    error: 1 error occurred:
    	* missing required configuration key "aws:region": The region where AWS operations will take place. Examples are us-east-1, us-west-2, etc.
    Set a value using the command `pulumi config set aws:region <value>`.