Cannot have more than 0 builds in queue for the account (codebuild)

Hello.

I did a little searching on the error message and found some examples where the issue was resolved by contacting AWS Support.
https://repost.aws/ja/questions/QUkKVl--5kSmCW42h1sZyq1w/codebuild-error-cannot-have-more-than-0-builds-in-queue-for-the-account
https://stackoverflow.com/questions/55600828/cannot-have-more-than-0-builds-in-queue-for-the-account

In this case, the issue is with your AWS account, so please open a case with AWS Support under "Account and billing".
Inquiries under "Account and billing" can be made free of charge.
https://docs.aws.amazon.com/awssupport/latest/user/case-management.html

Probably, but I thought it was related to CodeBuild quotas.
https://docs.aws.amazon.com/codebuild/latest/userguide/limits.html

Internal metrics will determine the default quotas for concurrent running builds.