Formfacade currently supports only public forms. If you have enabled "Restrict to users in your domain and its trusted organizations" option, then it will not work.
Restricting forms to domain users is part of the roadmap. You can take a look at the list of planned features and vote for the ones important for you. You can have a say in what we build next. https://formfacade.com/roadmap.htmlIn the meantime, if you want to restrict your form to users in your domain, but still use Formfacade, the workaround is to disable "Restrict to users in your domain and its trusted organizations" option to remove Google Signin and then embed this form in your private webpage that requires login.
The file upload question in Google Form requires respondent to signin with their gmail account to upload files and submit the form. This form will not be publicly visible. Users will have to signin with their gmail accounts to view the form, upload the files and submit the response. You can use the Formfacade add-on to convert Google Forms file upload question into HTML file upload and let your users upload files without sign in. Please refer to this help article for more details. https://formfacade.com/faq/google-forms-upload-file-without-google-account.html
Click Submit to finish.
To use this feature, you need our Gsuite addon.
Install this addon to customize Google Forms.