Installation fails with TypeError: __new__() missing 4 required positional arguments: 'kernel', 'initrd', 'root', and 'args'

Issue

• During kickstart installation of Red Hat Enterprise Linux 8, the installation encounters an error:

  Traceback (most recent call first):
  File "/usr/lib64/python3.6/site-packages/pyanaconda/kexec.py", line 46, in run_grubby
  boot_info = _BootInfo()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/kexec.py", line 87, in setup_kexec
  boot_info = run_grubby()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation_tasks.py", line 438, in run_task
  self._task(*self._task_args, **self._task_kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation_tasks.py", line 472, in start
  self.run_task()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation_tasks.py", line 304, in start
  item.start()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation_tasks.py", line 304, in start
  item.start()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation.py", line 205, in doConfiguration
  configuration_queue.start()
  File "/usr/lib64/python3.6/threading.py", line 864, in run
  self._target(*self._args, **self._kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/threading.py", line 286, in run
  threading.Thread.run(self)
  TypeError: __new__() missing 4 required positional arguments: 'kernel', 'initrd', 'root', and 'args'