Formfacade supports only public forms. You must disable Google Forms features that require sign-in to use your form with Formfacade. "Form is not publicly visible" warning message will be displayed if:
The form is not published
Responder access is restricted to specific people
"Collect email addresses" option is set to "Verified"
"Send responders a copy of their response" option is set to "Always"
The form contains a file upload questionÂ