My original message got deleted. I forgot, that no links are allowed. Anyways just a quick recap:
I'm on Linux and I've been spending over a day uninstalling and reinstalling my graphics drivers because of this R-0x4 issue just to find out, that IPv6 is needed for it to connect and I had disabled it a couple days ago due to issues with my Citrix Receiver.
I just wanted to share this in case another poor soul is out there spending way too much time on this.
EDIT: I'm on 5G temporarily, which is probably the reason for it. Maybe with DSL you don't have that issue.
Hope this helps.