Hi Aleksandar,
No, I have not deleted any security credentials or deleted my AWS account. However, I think this has got to do with new permission management in AWS. I created a new IAM users and generated Access Keys for the user. I have also given administrator access to the user.
IAM Best Practices - AWS Identity and Access Management
I think I will create a new account to be able to get the instance for now.
Thanks,
Stevanic