Dash plotly error e is null

[StevSoza]

Hi, someone knows about this error?

[jinnyzor]

Hello @StevSoza,

Could you give a little more detail for this?

I believe that this is typically something not quite working with the event(?).

[StevSoza]

Hello i figure out what was the problem, i was returned a checklist property value as None, instead now a return that as an empty list and no more error