The sim is not running. This is what I see now and I have disabled the AV as it says
The error message is quite clear, and it clearly indicates the cause, which is Couatl not started because your antivirus has killed it, which also explains why the Live Update didn't seem to download anything.
So, as the message says, do not just "disable the antivirus". Some antivirus are so defective that are still working in the background, even if you think they are disabled. That's why the message says to CONFIGURE the antivirus to exclude the Addon Manager folder from scanning, and not just disable it.
After you configured the antivirus correctly, run the Live Update again, as the message says.
And, be sure you don't have other software blocking the download, such a firewall, for example.