Account blocked error when launching EC2 instance

I am getting below error when launching EC2 instance for completing Day 21 task of 100 Days of Cloud(AWS).

Instance launch failed
This account is currently blocked and not recognized as a valid account. Please contact https://support.console.aws.amazon.com/support/home?region=us-east-1#/case/create?issueType=customer-service&serviceCode=account-management&categoryCode=account-verification if you have questions.

IAM user used for login: kk_labs_user_575680
Account ID: 147xxxx550

Thanks for reporting this. Please try the lab again – most likely this will not recur for you. I’ve reported this to engineering for further investigation, in the meantime. If it happens again, just report it as you’re doing here.

Thanks, it worked now.