The issues with App Center Build have been resolved and all operations are back to normal now. Thanks for bearing with us!
Posted Nov 20, 2019 - 13:45 UTC
Update
We are continuing to investigate this issue.
Posted Nov 20, 2019 - 13:44 UTC
Investigating
App Center is experiencing issues in the Build Service with Bitbucket repositories. We apologize for the inconvenience while we work to resolve this issue.