I am getting a 8015190A error when I attempt to sign into Xbox live

Here is a image of the error

I attempted to sign in to my Xbox live account and got error code 8015190A, after reading online at Microsoft how to fix the error code which was delete profile and download the profile again I get the same error code and unable to download my profile again.
I worked online with customer support who had me clear the cache 3 times and I still get the same error code. I am at a loss on how to proceed with fixing this code so that I can use my Xbox 360.

If you haven't already, check this link Error 8015190A occurs when you connect to Xbox Live | Xbox Support for further assistance.

1. This is an Xbox Series X console. The error happens when playing backwards compatible games. I had the same a similar problem in January of this year.

2. The console is not second hand. I'm the only user.

3. Yes, of course.

Under network settings, it says everything is fine. It's connected to the internet. It's connected to Xbox Live. NAT is open. When I play XSX or One games, there's no issue.

The problem is when connecting to Xbox Live through the 360 emulator. I got the error 8015190a. Support told me to delete the profile and clear the cache. Following that, whenever I boot a 360 game, it says "getting your Xbox 360 info". The loading bar does not move. After a couple of minutes, the screen fades to black and the game starts. Opening the guide shows that there's no profile. If I try to download a profile, it says "cannot connect to Xbox Live". There is no error code.

Some extra details:

In January I had the error 801540A9. This time the error was 8015190a. In both instances I was advised to clear the cache. In both instances, I was unable to redownload the profile (with some slight differences).

With the error 801540A9, I could at least access the sign in menu. I could enter my email and password, but the profile would fail to download.

With the error 8015190a, I am unable to enter my email and password.

I'm getting the error code when I attempt to access my Windows Live account on Xbox Live. My 360 has no problems connecting to Xbox Live, but when I try to sign in using my Windows Live ID I get the error code message.