KeyError: 'rocket_launch'

In workflow mode with background execution of batch nodes the default qadapter must contain the rocket_launch key but it is missing in the default qadapter:

Traceback (most recent call last):
  File "/usr/lib64/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/usr/lib64/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "vre-middleware/src/virtmat/middleware/engine/wfengine.py", line 352, in launcher
    self.qlaunch(fw_id)
  File "vre-middleware/src/virtmat/middleware/engine/wfengine.py", line 204, in qlaunch
    launch_rocket_to_queue(self.launchpad, self.fworker_qlaunch,
  File "python_VirtEnvs/vre-lang/lib64/python3.8/site-packages/fireworks/queue/queue_launcher.py", line 78, in launch_rocket_to_queue
    if "--offline" in qadapter["rocket_launch"] and not reserve:
KeyError: 'rocket_launch'

A workaround is to use the -q qdapter.yaml switch to override the default qadapter with a custom one that contains the key.