Cbbackup - ValueError: too many values to unpack

I am running Couchbase Community Edition 6.0 and I am trying to backup a bucket using the cbbackup command. There are a series of thread errors from Python. Any ideas?

2020-04-10 12:03:15,313: mt cbbackup...
2020-04-10 12:03:15,313: mt  source : http://<server_name>:8091
2020-04-10 12:03:15,313: mt  sink   : /data/backups/cbbackup_20200410
2020-04-10 12:03:15,313: mt  opts   : {'username': '<xxx>', 'verbose': 1, 'extra': {'max_retry': 10.0, 'rehash': 0.0, 'dcp_consumer_queue_length': 1000.0, 'data_only': 0.0, 'uncompress': 0.0, 'nmv_retry': 1.0, 'conflict_resolve': 1.0, 'cbb_max_mb': 100000.0, 'report': 5.0, 'mcd_compatible': 1.0, 'try_xwm': 1.0, 'backoff_cap': 10.0, 'batch_max_bytes': 400000.0, 'report_full': 2000.0, 'flow_control': 1.0, 'batch_max_size': 1000.0, 'seqno': 0.0, 'design_doc_only': 0.0, 'allow_recovery_vb_remap': 0.0, 'recv_min_bytes': 4096.0}, 'collection': None, 'ssl': False, 'threads': 4, 'key': None, 'password': '<xxx>', 'id': None, 'bucket_source': 'PFM', 'silent': False, 'dry_run': False, 'single_node': False, 'vbucket_list': None, 'separator': '::', 'mode': 'full'}
2020-04-10 12:03:15,345: mt Starting new HTTP connection (1): <server_name>
2020-04-10 12:03:15,360: mt bucket: PFM
Exception in thread s0:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 765, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 644, in run
    rv, db, db_dir = self.create_db(cbb)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 770, in create_db
    rv, dir = self.mkdirs()
ValueError: too many values to unpack

Exception in thread s1:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 765, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 644, in run
    rv, db, db_dir = self.create_db(cbb)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 770, in create_db
    rv, dir = self.mkdirs()
ValueError: too many values to unpack

Exception in thread s2:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 765, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 644, in run
    rv, db, db_dir = self.create_db(cbb)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 770, in create_db
    rv, dir = self.mkdirs()
ValueError: too many values to unpack

Exception in thread s3:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 765, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 644, in run
    rv, db, db_dir = self.create_db(cbb)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 770, in create_db
    rv, dir = self.mkdirs()
ValueError: too many values to unpack

2020-04-10 12:03:15,853: w2   source : http://<server_name>:8091(PFM@<server_ip>:8091)
2020-04-10 12:03:15,853: w2   sink   : /data/backups/cbbackup_20200410(PFM@<server_ip>:8091)
2020-04-10 12:03:15,854: w2          :                total |       last |    per sec
Exception in thread s2:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 765, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 644, in run
    rv, db, db_dir = self.create_db(cbb)
  File "/opt/couchbase/lib/python/pump_bfd.py", line 770, in create_db
    rv, dir = self.mkdirs()
ValueError: too many values to unpack

2020-04-10 12:03:15,892: w1   source : http://<server_name>:8091(PFM@<server_ip>:8091)
2020-04-10 12:03:15,893: w1   sink   : /data/backups/cbbackup_20200410(PFM@<server_ip>:8091)
2020-04-10 12:03:15,893: w1          :                total |       last |    per sec
2020-04-10 12:03:15,971: w0   source : http://<server_name>:8091(PFM@<server_ip>:8091)
2020-04-10 12:03:15,971: w0   sink   : /data/backups/cbbackup_20200410(PFM@<server_ip>:8091)
2020-04-10 12:03:15,972: w0          :                total |       last |    per sec
2020-04-10 12:03:16,255: w3   source : http://<server_name>:8091(PFM@<server_ip>:8091)
2020-04-10 12:03:16,256: w3   sink   : /data/backups/cbbackup_20200410(PFM@<server_ip>:8091)
2020-04-10 12:03:16,256: w3          :                total |       last |    per sec
2020-04-10 12:03:16,337: w2   source : http://<server_name>:8091(PFM@<server_IP>:8091)
2020-04-10 12:03:16,337: w2   sink   : /data/backups/cbbackup_20200410(PFM@<server_ip>:8091)
2020-04-10 12:03:16,337: w2          :                total |       last |    per sec
error: cannot use a dead worker

Hello @anthony.valenti, See this post about this issue. I have locked the post to keep the discussion in one place.