Hey,
i tried to set up a flow that whenever a customers choose to pay per bank transfer that he automatically receives his order invoice.
The flow successfully recognises that a customer has paid via bank transfer but does not send out the mail.
Instead i get this error message:
A temporary error has occurred: GraphQL Response User Errors: “Sender is invalid”.
Unfortunately, I have no idea why this error occurs.
This is my setup for the mail:

