Same issue here, workflow has been working without any problems and this morning we got the error:

Run result unavailable: job failed with error message

Unexpected failure while waiting for the cluster (--------------) to be ready.Cause Unexpected state for cluster (----------------: INVALID_ARGUMENT(CLIENT_ERROR): databricks_error_message:Container setup failed because of an invalid request: Spark image "release__9.1.x-snapshot-scala2.12__databricks-universe__head__9e5c85c__96835dd__jenkins__140ce8f__format-2" failed to download or does not exist.