Nova backup job failed with 'LocalStorage' object has no attribute 'add_stream'

Trying to execute job with action Nova backup, path to backup - local storage.

2016-09-12 17:41:14.494 21373 INFO freezer.main [-] Begin freezer agent process with args: ['/usr/local/bin/freezer-agent', '--metadata-out', '-', '--config', '/tmp/tmpoR_5Vd']
2016-09-12 17:41:14.494 21373 INFO freezer.main [-] log file at /opt/stack/.freezer/freezer.log
2016-09-12 17:41:15.204 21373 INFO freezer.job [-] Validating args for the backup job.
2016-09-12 17:41:15.205 21373 INFO freezer.main [-] Job execution Started at: 2016-09-12 17:41:15
2016-09-12 17:41:15.205 21373 INFO freezer.job [-] Backup job started. backup_name: job11, container: /opt/stack/novaback/, hostname: ubuntu1404-dev, mode: nova, Storage: local, compression: gzip
2016-09-12 17:41:15.248 21373 INFO freezer.job [-] Executing nova backup. Instance ID: 2ce41b8f-1246-4fe6-a226-58708993565e
2016-09-12 17:41:22.146 21373 INFO freezer.openstack.backup [-] Uploading image to swift
2016-09-12 17:41:22.147 21373 ERROR freezer.main [-] 'LocalStorage' object has no attribute 'add_stream'
2016-09-12 17:41:22.147 21373 ERROR freezer.main Traceback (most recent call last):
2016-09-12 17:41:22.147 21373 ERROR freezer.main File "/opt/stack/freezer/freezer/main.py", line 216, in main
2016-09-12 17:41:22.147 21373 ERROR freezer.main freezer_main(backup_args)
2016-09-12 17:41:22.147 21373 ERROR freezer.main File "/opt/stack/freezer/freezer/main.py", line 111, in freezer_main
2016-09-12 17:41:22.147 21373 ERROR freezer.main run_job(backup_args, storage)
2016-09-12 17:41:22.147 21373 ERROR freezer.main File "/opt/stack/freezer/freezer/main.py", line 127, in run_job
2016-09-12 17:41:22.147 21373 ERROR freezer.main response = freezer_job.execute()
2016-09-12 17:41:22.147 21373 ERROR freezer.main File "/opt/stack/freezer/freezer/job.py", line 123, in execute
2016-09-12 17:41:22.147 21373 ERROR freezer.main backup_level = self.backup(app_mode)
2016-09-12 17:41:22.147 21373 ERROR freezer.main File "/opt/stack/freezer/freezer/job.py", line 227, in backup
2016-09-12 17:41:22.147 21373 ERROR freezer.main backup_os.backup_nova(self.conf.nova_inst_id)
2016-09-12 17:41:22.147 21373 ERROR freezer.main File "/opt/stack/freezer/freezer/openstack/backup.py", line 74, in backup_nova
2016-09-12 17:41:22.147 21373 ERROR freezer.main self.storage.add_stream(stream, package, headers)
2016-09-12 17:41:22.147 21373 ERROR freezer.main AttributeError: 'LocalStorage' object has no attribute 'add_stream'
2016-09-12 17:41:22.147 21373 ERROR freezer.main
2016-09-12 17:41:22.147 21373 CRITICAL freezer.main [-] End freezer agent process unsuccessfully
2016-09-12 17:41:22.147 21373 CRITICAL freezer.main [-] Critical Error: 'LocalStorage' object has no attribute 'add_stream'