1. Me too means, yes I´m having the EXACT same error!!
I can't possibly be sure, considering another user said he had the same error, but in fact it was different, so I asked, just to be sure.
2. I have no anti virus on or firewall, so IT IS NOT THAT.
I'm sorry but, unless you haven't updated GSX in a while, your log seems to confirm some kind of external interference which, as I've said, can only be caused by a firewall or antivirus.
Are you SURE you don't have *any* of that ? Not even the default Windows Defender, meaning you have explicitly disabled both the Windows Defender Antivirus and the Firewall ?
Because, your log indicates you have an outdated GSX, the Couatl .EXE version is 4.8.0.4834, while the one we have online is 4.8.0.5027, so you are many versions behind, and the lines of code in your log points to line numbers that have been changed, suggesting not just the .exe is outdated, but the most of the scripts code as well.
Please check again if you have Windows Defender Antivirus and the Windows Defender Firewall, be sure the whole Addon Manager folder is added to the Antivirus Exclusions and be sure there's no firewall blocking the updater, then try the FSDT Live Update again.
If that doesn't work, try updating using the OFFLINE installer found in the Sticky thread of this section.