# Error while trying to run form

**URL:** <https://forum.rasa.com/t/error-while-trying-to-run-form/58011>\
**Category:** Feedback on Rasa Open Source\
**Tags:** community, rasa\
**Created:** [April 17, 2023, 7:37am UTC](https://forum.rasa.com/t/error-while-trying-to-run-form/58011 "2023-04-17T07:37:00Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![stephens](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/stephens/32/1632_2.png) [@stephens](https://forum.rasa.com/u/stephens)\
**Post date:** [April 18, 2023, 3:28am UTC](https://forum.rasa.com/t/error-while-trying-to-run-form/58011/2 "2023-04-18T03:28:29Z")

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You need to follow the [docs](https://rasa.com/docs/rasa/forms/#dynamic-form-behavior). `required_slots` is a method within a `FormValidationAction` class.

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_[View the full topic](https://forum.rasa.com/t/error-while-trying-to-run-form/58011)._