Using JSON file with Visualize view does not work

[wk9874]

If I try to use data from a JSON file with the visualizer, it does not work.

What I did:
python inflammation-analysis.py --view visualize --patient 1 --file json patients.json

Result:
Traceback (most recent call last):
File "/home/wk9874/Documents/rse_training/python-intermediate-inflammation/inflammation-analysis.py", line 78, in
main(args)
File "/home/wk9874/Documents/rse_training/python-intermediate-inflammation/inflammation-analysis.py", line 30, in main
'average': models.daily_mean(inflammation_data),
File "/home/wk9874/Documents/rse_training/python-intermediate-inflammation/inflammation/models.py", line 26, in daily_mean
return np.mean(data, axis=0)
File "<array_function internals>", line 180, in mean
File "/home/wk9874/Documents/rse_training/python-intermediate-inflammation/venv/lib/python3.10/site-packages/numpy/core/fromnumeric.py", line 3432, in mean
return _methods._mean(a, axis=axis, dtype=dtype,
File "/home/wk9874/Documents/rse_training/python-intermediate-inflammation/venv/lib/python3.10/site-packages/numpy/core/_methods.py", line 180, in _mean
ret = umr_sum(arr, axis, dtype, out, keepdims, where=where)
TypeError: unsupported operand type(s) for +: 'Patient' and 'Patient'