We've identified that this is caused by an ongoing incident with Docker Hub, which is causing image pulls to fail. Builds and deployments that use Docker Hub images may fail until this is resolved.
Images from other registries are not affected. You can follow Docker's updates here: https://www.dockerstatus.com/incidents/01M4HA1E00AH6NXA276AW0CK2V
We're monitoring closely and will share an update as pulls recover.
We are aware of an issue affecting builds and deployments that use images from Docker Hub. Affected builds or deploys may fail with a "429 Too Many Requests" error when pulling images.
We are actively investigating and will provide updates as we learn more.