The samba-tool command is failing with "ERROR(class 'ModuleNotFoundError'): uncaught exception - No module named 'samba.samdb'"

Issue

• The samba-tool command is failing with ERROR(<class 'ModuleNotFoundError'>): uncaught exception - No module named 'samba.samdb'. i.e:

# samba-tool domain join example.com DC --use-krb5-ccache=/tmp/krb5cc_0
ERROR(<class 'ModuleNotFoundError'>): uncaught exception - No module named 'samba.samdb'
  File "/usr/bin/samba-tool", line 44, in <module>
    retval = cmd._run("samba-tool", subcommand, *args)
  File "/usr/lib64/python3.6/site-packages/samba/netcmd/__init__.py", line 235, in _run
    return self.subcommands[subcommand]._run(
  File "/usr/lib64/python3.6/site-packages/samba/netcmd/main.py", line 36, in __getitem__
    fromlist=['cmd_%s' % attr]),
  File "/usr/lib64/python3.6/site-packages/samba/netcmd/domain.py", line 43, in <module>
    from samba.join import join_RODC, join_DC
  File "/usr/lib64/python3.6/site-packages/samba/join.py", line 22, in <module>
    from samba.samdb import SamDB