pdbe nonetype

```

Re File "C:\Users\jhs\Miniconda3\envs\py38_pyhdx_040\lib\site-packages\param\parameterized.py", line 2021, in _ex watcher.fn(*args, **kwargs)

File "C:\Users\jhs\Miniconda3\envs\py38_pyhdx_040\lib\site-packages\panel\param.py", line 474, in action

value(self.object)

File "C:\Users\jhs\Programming\pyhdx_stable\pyhdx\web\views.py", line 513, in Fir reset = param. Action (lambda self: self._action_reset())

File "C:\Users\jhs\Programming\pyhdx_stable\pyhdx\web\views.py", line 535, in _action_reset self.pdbe.reset(data)

AttributeError: 'NoneType' object has no attribute 'reset'

```

Read pyhdx/web/views.py around lines 513 and 535, following the reset action shown in the traceback. Trace why self.pdbe is None when _action_reset calls reset, then verify that triggering the reset action no longer raises the reported AttributeError.

Scritto dal modello di indicizzazione a partire dal testo della issue.