How do I make a change in form.py?

Hi! I upgrade my rasa from rasa 1.10 to rasa 2.0 and everything is working fine until i upgrade my rasa to the latest one.

Rasa Version      :         2.8.12
Minimum Compatible Version: 2.8.9
Rasa SDK Version  :         2.8.2
Rasa X Version    :         None
Python Version    :         3.8.0
Operating System  :         Windows-10-10.0.19041-SP0
Python Path       :         C:\Users\User\miniconda3\envs\rasa_demo3\python.exe

I cant run my action files that required form. My question is do i have to change/add something in my forms.py since I only see Class for FormAction and it doesn’t have any class that related to FormValidationAction

import logging
import typing
from typing import Dict, Text, Any, List, Union, Optional, Tuple

from rasa_sdk import utils
from rasa_sdk.events import SlotSet, Form, EventType
from rasa_sdk.interfaces import Action, ActionExecutionRejection

logger = logging.getLogger(__name__)

if typing.TYPE_CHECKING:
    from rasa_sdk import Tracker
    from rasa_sdk.executor import CollectingDispatcher

# this slot is used to store information needed
# to do the form handling
REQUESTED_SLOT = "requested_slot"


class FormAction(Action):
    def name(self) -> Text:
        """Unique identifier of the form"""

        raise NotImplementedError("A form must implement a name")

    @staticmethod
    def required_slots(tracker: "Tracker") -> List[Text]:
        """A list of required slots that the form has to fill.

        Use `tracker` to request different list of slots
        depending on the state of the dialogue
        """

        raise NotImplementedError(
            "A form must implement required slots that it has to fill"
        )

Here some of the code from my form.py! Please help me, thank you!

Hi, can you explain what you mean by:

I cant run my action files that required form

Are you seeing an error when you run rasa run actions? What kind of error?

What is this code you linked? It looks like it’s unimplemented. Could you share how you’ve defined your form in your domain.yml?