Build failed to start. The following error occurred: Cannot have more than 0 builds in queue for the account

Duplicate: https://repost.aws/questions/QUxsq-Hv5GSPa_Pth-5ZVckQ/cannot-get-codebuild-to-build-more-than-1-concurrent-build

There are various account level quotas that AWS sets for new and existing accounts. Some of the quotas protect you from unpredicted cost skyrocketing when you just start the cloud journey, the other ones might be applied if AWS detects something unusual in your accounts (e.g. an open vulnerability, an expired credit card, ...) The best way to resolve this issue is contacting AWS Support and requesting the quota increase for the number of concurrent builds in AWS CodeBuild. If there are some things that need to be fixed in your account first, you will be informed about that. Otherwise, the quota will be increased, so you can run more than one build in parallel.

Some potential causes:

• Security vulnerability in the account: AWS automatically raised a support ticket and suspended all resources that were linked to it. Chat with aws support to resolve the issue and resume service
• Credit card infromation is expired: Update to working credit card. Delete CodeBuild project and create a new one.
• Security issue: "code build project" connecting to a GitHub repository with AWS Access Key and Secret hard coding the buildspec.yml file. With this AWS identified it as an unauthorized login. So they added security restrictions to the resources while opening a support issue. In such a case you can look for the emails from AWS in which they explain the reason for this behavior and the steps to get this corrected.