I have set default_output_uri to s3://my_minio_instance:9000/clearml

If I set files_server to s3://my_minio_instance:9000 /bucket_that_does_not_exist it fails at uploading metrics, but model upload still works:

WARNING - Failed uploading to s3://my_minio_instance:9000/ bucket_that_does_not_exist ('NoneType' object has no attribute 'upload')

clearml.Task - INFO - Completed model upload to s3://my_minio_instance:9000/clearml

What is default_output_uri for? Only artifact upload?