Formfacade supports only public forms. "Form is not publicly visible" warning message will be displayed if you have enabled any of the Google Forms' features that require signin. You can refer to this help article below to fix this. https://formfacade.com/website/form-not-publicly-visible-fix.html File upload Google Forms file upload option requires users to login to view the form, upload files and submit it. You must convert the google forms file upload that requires login into a html file upload question using the Formfacade addon before embedding the form on your website or using the Formfacade share link to collect responses. The file upload size limit in Formfacade is determined by the subscription plan you have. If your primary requirement is to collect large files, you should upgrade to the file upload plan 10gb, 100gb or 1tb. You can increase the max file size to up to 1gb per file (depends on the plan), the number of files per file upload question, restrict file types, enable unlisted links to allow anyone to access the files, add collaborators to provide access to specific users and use our addon to sync the uploaded files to your google drive. Formfacade - File upload https://formfacade.com/file-upload/pricing.html