We have created a new Bitbucket OAuth Consumer app to resolve this issue that can be reauthorized on your Probo.CI account by logging out of https://app.probo.ci/
and logging back in to Probo.CI to accept the new application access permissions. Once access to the Probo.CI app has been authorized toggle Disable/Enable on your Bitbucket repositories from the Sync Repos page on your account, https://app.probo.ci/#/dashboard/repos
. Once your Bitbucket repositories have been disabled and re-enabled on your account you should be able to submit a new Probo builds.
We have verified multiple customer builds are working again at this time, so we are marking this as resolved, but please contact Probo Support if you continue to have issues submitting builds from your Bitbucket account.