When I am uploading the template to Cloudformation to create a stack, I am getting Template Validation error
I’m assuming you are talking about the Networking lab and I’m unable to reproduce your error. The Step_1_setup.yaml only has 155 lines total so I’m not sure where the line 530 might be coming in. I was just able to run Step 1 in regions CA-CENTRAL-1 and AP-SOUTHEAST-2 without error.
Could you by chance provide some more detail and logs?