Failing during initial run

[ntadepalli9]

I just installed and try to run the visualizer. Configured the aws credentials properly. Got below errors. Any suggestions would be appreciated.

$ aws-dot -d . -n -r us-east-1
Traceback (most recent call last):
File "/usr/local/bin/aws-dot", line 11, in
sys.exit(main())
File "/usr/local/lib/python2.7/dist-packages/aws_visualizer/dot/graph_region.py", line 571, in main
visualizer.print_security_group_tables()
File "/usr/local/lib/python2.7/dist-packages/aws_visualizer/dot/graph_region.py", line 512, in print_security_group_tables
self.load_security_table_of_vpc(vpc['VpcId'])
File "/usr/local/lib/python2.7/dist-packages/aws_visualizer/dot/graph_region.py", line 373, in load_security_table_of_vpc
for loadbalancer in self.get_loadbalancers_in_vpc(vpc_id):
File "/usr/local/lib/python2.7/dist-packages/aws_visualizer/dot/graph_region.py", line 527, in get_loadbalancers_in_vpc
return list(filter(lambda lb: (lb.get_vpc_id() == vpc_id), self.loadbalancers))
File "/usr/local/lib/python2.7/dist-packages/aws_visualizer/dot/graph_region.py", line 527, in
return list(filter(lambda lb: (lb.get_vpc_id() == vpc_id), self.loadbalancers))
File "/usr/local/lib/python2.7/dist-packages/aws_visualizer/dot/graph_region.py", line 152, in get_vpc_id
return self['VpcId'] if 'VpcId' in self else self['VPCId']
KeyError: 'VPCId'