TypeError: _init_runner() missing 1 required positional argument: 'runner_cls'

Got this error when trying to resume from saved session.

Detail:
ubuntu@201611-25229:~$ checkbox-cli
=========================[ Resume Incomplete Session ]==========================
There is 1 incomplete session that might be resumed
Do you want to resume session 'checkbox-cli-2018-08-31T05.50.25'?
  r => resume this session
  n => next session
  c => create new session
  d => delete old sessions
[rncd]: r
WARNING:plainbox.ctrl:local script com.canonical.certification::environment returned invalid RFC822 data: Job has a duplicate key '' with old value 'DO\n' and new value 'cd\n' (line 78)
ERROR:plainbox.bug:Undeclared exception TypeError raised from resume_session

                        Application Malfunction Detected

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/guacamole/core.py", line 248, in eat
    return self._dispatch()
  File "/usr/lib/python3/dist-packages/guacamole/core.py", line 298, in _dispatch
    result = ingredient.dispatch(self.context)
  File "/usr/lib/python3/dist-packages/guacamole/ingredients/cmdtree.py", line 152, in dispatch
    return self._dispatch(context, 0)
  File "/usr/lib/python3/dist-packages/guacamole/ingredients/cmdtree.py", line 179, in _dispatch
    return self._dispatch_None(context, level, retval, command)
  File "/usr/lib/python3/dist-packages/guacamole/ingredients/cmdtree.py", line 208, in _dispatch_None
    return self._dispatch(context, level + 1)
  File "/usr/lib/python3/dist-packages/guacamole/ingredients/cmdtree.py", line 165, in _dispatch
    retval = command.invoked(context)
  File "/usr/lib/python3/dist-packages/checkbox_ng/launcher/subcommands.py", line 251, in invoked
    if not self._maybe_resume_session():
  File "/usr/lib/python3/dist-packages/checkbox_ng/launcher/subcommands.py", line 351, in _maybe_resume_session
    return self._run_resume_ui_loop(resume_candidates)
  File "/usr/lib/python3/dist-packages/checkbox_ng/launcher/subcommands.py", line 368, in _run_resume_ui_loop
    self._resume_session(candidate)
  File "/usr/lib/python3/dist-packages/checkbox_ng/launcher/subcommands.py", line 376, in _resume_session
    metadata = self.ctx.sa.resume_session(session.id)
  File "/usr/lib/python3/dist-packages/plainbox/impl/decorators.py", line 142, in wrapper
    raise exc
  File "/usr/lib/python3/dist-packages/plainbox/impl/decorators.py", line 136, in wrapper
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/plainbox/impl/session/assistant.py", line 634, in resume_session
    self._init_runner()
TypeError: _init_runner() missing 1 required positional argument: 'runner_cls'

  Please report a bug including the information from the paragraph above. To
  report the bug visit https://bugs.launchpad.net/checkbox-ng/+filebug

  We are sorry for the inconvenience!

Checkbox version:
- checkbox-ng 1.2.0rc2
- checkbox-support 0.39.0rc2
- plainbox-provider-resource 0.38.0rc2
- plainbox-provider-checkbox 0.46.0rc2
- plainbox-provider-tpm2 1.8.0rc2
- plainbox-provider-certification-client 0.35.0rc2