After setup and try to login a message appears "Invalid SignIn request body!

I started the service locally with the dockercompose.yml and when i open the website and succesfully added the smtp connection i get a "Invalid SignIn request body" when i try to login withe the email.

Any hints on this?

<img width="1050" height="508" alt="Image" src="https://github.com/user-attachments/assets/2c1a1a21-a9db-4ee9-b9ce-76a0db8e82f1" />

