Horizon error "Danger: An Error occurred. Please try again later" on attempting resize after update

Issue

• When we try to resize a instance via Horizon it throws a error on two clouds both running latest updates. The error in the container logs is:

horizon/horizon.log:2022-05-20 15:04:08,289 34 ERROR django.request Internal Server Error: /dashboard/project/instances/d108e7f9-6f36-4175-8df6-37d6bef3bbf9/resize

• This seems to perhaps be related to this issue.

• We expect Horizon to open a window that allows us to choose a flavor, this is not happening. A image of the error has been added below:
  

  

• The following error is seen in the horizon logs:

2022-05-23 14:36:29,943 58 ERROR django.request Internal Server Error: /dashboard/project/instances/11df425f-325c-4a2c-a444-060d198d767e/resize
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/horizon/utils/memoized.py", line 107, in wrapped
    value = cache[key] = cache.pop(key)
KeyError: ((<weakref at 0x7f1b78407d18; to 'ResizeView' at 0x7f1b7839aa20>,), ())

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/django/core/handlers/exception.py", line 35, in inner
    response = get_response(request)
  File "/usr/lib/python3.6/site-packages/django/core/handlers/base.py", line 128, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/decorators.py", line 52, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/decorators.py", line 36, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/decorators.py", line 36, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/decorators.py", line 113, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/decorators.py", line 84, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/django/views/generic/base.py", line 89, in dispatch
    return handler(request, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/workflows/views.py", line 155, in get
    context = self.get_context_data(**kwargs)
  File "/usr/share/openstack-dashboard/openstack_dashboard/dashboards/project/instances/views.py", line 589, in get_context_data
    context = super(ResizeView, self).get_context_data(**kwargs)
  File "/usr/lib/python3.6/site-packages/horizon/workflows/views.py", line 93, in get_context_data
    workflow = self.get_workflow()
  File "/usr/lib/python3.6/site-packages/horizon/workflows/views.py", line 79, in get_workflow
    extra_context = self.get_initial()
  File "/usr/share/openstack-dashboard/openstack_dashboard/dashboards/project/instances/views.py", line 630, in get_initial
    _object = self.get_object()   
  File "/usr/lib/python3.6/site-packages/horizon/utils/memoized.py", line 109, in wrapped
    value = cache[key] = func(*args, **kwargs)
  File "/usr/share/openstack-dashboard/openstack_dashboard/dashboards/project/instances/views.py", line 602, in get_object
    flavor_id = instance.flavor['id']
KeyError: 'id'