runtime error when loading visualisation base data config for Lung cancer

[id2359]

Locally,

Deleted everything as a fresh start
Imported staging Lung cancer
Added one test patient.
In shell,
issued
django-admin generate_visualisation_dataframe

23-04-05 15:51:14.564934 visualisation base data config: generating json data for ICHOMLC
[INFO:2023-04-05 15:51:14,565:data.py:83:init] forcing reload of dataframe..
[INFO:2023-04-05 15:51:14,572:data.py:97:init] time taken to load/generate df = 0.007025 seconds
Traceback (most recent call last):
File "/env/bin/django-admin", line 8, in
sys.exit(execute_from_command_line())
File "/env/lib/python3.8/site-packages/django/core/management/init.py", line 419, in execute_from_command_line
utility.execute()
File "/env/lib/python3.8/site-packages/django/core/management/init.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/env/lib/python3.8/site-packages/django/core/management/base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "/env/lib/python3.8/site-packages/django/core/management/base.py", line 398, in execute
output = self.handle(*args, **options)
File "/app/rdrf/rdrf/management/commands/generate_visualisation_dataframe.py", line 18, in handle
json_data = rdf.data.to_json()
AttributeError: 'NoneType' object has no attribute 'to_json'

[id2359]

This is caused because no data exists in the clinical data records yet

[id2359]

printed message if this fails.
Data needs to be entered into the data records to create a valid dataframe