Page Refresh gives the following error

## Details
- OS (Operating System) version: OS
- Browser and browser version: Chrome
- Django version: 4.1.6
- Log viewer version: latest

### Steps to reproduce

1. Go to /logs
2. refresh page

```
ERROR 2023-04-21 22:10:28,947 django.request.log_response:241- Internal Server Error: /logs/json/
Traceback (most recent call last):
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/sentry_sdk/integrations/django/views.py", line 85, in sentry_wrapped_callback
return callback(request, *args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/views/generic/base.py", line 104, in view
return self.dispatch(request, *args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/utils/decorators.py", line 46, in _wrapper
return bound_method(*args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapper_view
return view_func(request, *args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/utils/decorators.py", line 46, in _wrapper
return bound_method(*args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapper_view
return view_func(request, *args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/log_viewer/views.py", line 23, in dispatch
return super(TemplateView, self).dispatch(*args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/views/generic/base.py", line 143, in dispatch
return handler(request, *args, **kwargs)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/django/views/generic/base.py", line 227, in get
return self.render_to_response(context)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/log_viewer/views.py", line 106, in render_to_response
log_json = self.get_log_json(context)
File "/Users/magedhelmy/Library/Caches/pypoetry/virtualenvs/compute-local-ILDnfiEN-py3.10/lib/python3.10/site-packages/log_viewer/views.py", line 47, in get_log_json
context["next_page_files"] = log_file_data["next_page_files"]
KeyError: 'next_page_files'
```