Service Outage - Investigating

The core issue has been identified and the change which caused it has been reversed. Builds should now start normally.

An issue has been reported with the Unity Build Automation Service. Specifically, builds are not starting as expected and are failing during configuration with the error/warning:
“Uploading build steps failed. ! login failed. Reason: Invalid request signature!”
We are investigating this issue and will update this message with further information.