TurboTax Deluxe 2023 Will Not Save My Return

I just bought and downloaded the desktop version of TurboTax Deluxe 2023 and installed it. I then registered/activated it. Next I open TurboTax 2023 on my iMac and imported my personal data from my 2022 return.

I then tried to save my new 2023 return but I constantly get this error message:

The document “Untitled” could not be saved as “Tax Return 23”.

How can I save my return so I can access it later and continue to work on it?