TypeError: __init__() got an unexpected keyword argument 'mappings'

[ChrisRahme (Chris Rahmé)]

@lis

slots:
  cc_num:
    type: rasa.shared.core.slots.ListSlot
    initial_value: null
    auto_fill: true
    influence_conversation: true
    mappings:
    - type: custom

You are using Rasa 3.x format with Rasa 2.x

For the Rasa 2.x docs, go to rasa.com/docs/rasa/2.x.