Python SDK 3.0.5 exception on import

>>> from couchbase.cluster import Cluster, ClusterOptions
Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/couchbase_core/_pyport.py", line 57, in <module>
from six import with_metaclass
ModuleNotFoundError: No module named 'six'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.8/dist-packages/couchbase/_init_.py", line 1, in <module>
import couchbase_core._bootstrap
File "/usr/local/lib/python3.8/dist-packages/couchbase_core/_init_.py", line 67, in <module>
from couchbase_core._pyport import ulp, with_metaclass
File "/usr/local/lib/python3.8/dist-packages/couchbase_core/_pyport.py", line 59, in <module>
from future.utils import with_metaclass
ModuleNotFoundError: No module named 'future'
>>> quit()
root@456d2367ffd8:/# python3 -m pip uninstall couchbase
Found existing installation: couchbase 3.0.5