"You have not been authorized to use this domain."
I finally managed to disable Redirect domain by turning off HTTPS availability first. Unfortunately, the domain unauthorized error was back and would not go away. After that, I was unable to alter any settings including HTTPS availability.
Today, I simply deleted the original domain associated with Blogger and then rebound it back. The domain unauthorized error disappears and I can feel free to do any settings change like before. Hope that such an annoying error won't be back again. I still don't understand how this error occurred and what triggered it. It appears to me that it is the issue in Blogger or Google.
In sum, for my case, to fix this domain unauthorized error, I did nothing on DNS but only playing with Blogger settings. Deleting the already bound domain first and then associating it back fix the issue.