Hello @Pedro
Welcome to the Atlassian community.
In order to help you debug your scenario we need more information.
Your post tags indicate you are using a Free subscription. Is that accurate?
For what type of project did you create the form?
Exactly how are you accessing the form?
Exactly what error message is displayed?
Has the user trying to access the form been granted access to Jira?
What are the details of the form configuration?
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