subscription-manager commands fails with the error "configparser.InterpolationSyntaxError: bad interpolation variable reference '%(ca_cert_dir)redhat-uep.pem'"

Issue

• subscription-manager commands fails with the below error:-

  # subscription-manager clean
  Traceback (most recent call last):
    File "/usr/sbin/subscription-manager", line 11, in <module>
      load_entry_point('subscription-manager==1.28.40', 'console_scripts', 'subscription-manager')()
    File "/usr/lib64/python3.6/site-packages/subscription_manager/scripts/subscription_manager.py", line 79, in main
      return managercli.ManagerCLI().main()
    File "/usr/lib64/python3.6/site-packages/subscription_manager/managercli.py", line 3830, in __init__
      CLI.__init__(self, command_classes=commands)
    File "/usr/lib64/python3.6/site-packages/subscription_manager/cli.py", line 110, in __init__
      cmd = clazz()
    File "/usr/lib64/python3.6/site-packages/subscription_manager/managercli.py", line 3159, in __init__
      for name, _value in list(section.items()):
    File "/usr/lib64/python3.6/_collections_abc.py", line 744, in __iter__
      yield (key, self._mapping[key])
    File "/usr/lib64/python3.6/site-packages/rhsmlib/services/config.py", line 108, in __getitem__
      if key in self:
    File "/usr/lib64/python3.6/site-packages/rhsmlib/services/config.py", line 126, in __contains__
      return self._parser.has_option(self._section, key)
    File "/usr/lib64/python3.6/site-packages/rhsm/config.py", line 288, in has_option
      self.get(section, prop)
    File "/usr/lib64/python3.6/site-packages/rhsm/config.py", line 188, in get
      return SafeConfigParser.get(self, section, prop)
    File "/usr/lib/python3.6/site-packages/iniparse/compat.py", line 228, in get
      return self._interpolate(section, option, value, d)
    File "/usr/lib/python3.6/site-packages/iniparse/compat.py", line 304, in _interpolate
      self._interpolate_some(option, L, rawval, section, vars, 1)
    File "/usr/lib/python3.6/site-packages/iniparse/compat.py", line 329, in _interpolate_some
      "bad interpolation variable reference %r" % rest)
  configparser.InterpolationSyntaxError: bad interpolation variable reference '%(ca_cert_dir)redhat-uep.pem'