If any domain errors persist, even though the editor says your domain is ready to go – it's likely because your browser is pulling the contents of your app from its memory.

To resolve this, you'll want to delete your browser's cookies and cache using the browser's settings screen. It's very important to delete both, and you will be prompted to log back into most websites. If you are not prompted to log back into websites where you were previously logged in, this operation was likely not completed correctly.

For more information on domains, check out our manual entry here.