it was a good log, thanks. It looks like the basic call to authenticate with Nord is failing. I don't have an active Nord account, but I have an inactive one and just now I was able to go right through the step you're failing at (which is basically checking you have a valid account to be able to use the Nord API), and retrieve data via the API, before being disallowed to connect.
So maybe there's a problem with your account? Maybe when you tried it the API wasn't available? Maybe it's down to the fact you're running OpenELEC from ~3 years ago. If your account is good, I'd upgrade to a stable LibreELEC and try again. Nord is one of the more popular providers, so if it wasn't working I'd expect to see more people opening bugs, especially given where it's failing.
Just wanted to let you know that updating to LibreELEC worked flawlessly. Thanks for a nice add on and great support!