Since Google’s security policies prevent editing forms in external applications, clicking the Edit button inside an embedded view will result in a “docs.google.com refused to connect” error.
In this case, just refresh the page to restore the embedder’s state.
Google does not support uploading files in external applications.
Trying to embed a Google Form that contains a “File upload” question will result in a “docs.google.com refused to connect” error.
Make sure your Form is not restricted.
In Google Forms, click on Send in the upper right corner of the screen.
Click the link button, then Copy.