Hi @m2f welcome to the CircleCI community! This error message occurs when your account is flagged as part of our compliance with U.S. export control laws and sanctions, you can read more here:
However, if you believe you were mistakenly flagged, as this can occur, please submit the appeal form linked in the article above and submit a ticket to support@circleci.com with your Bitbucket username so we can take a closer look. Hopefully we can get you building again soon!