Hey Xplic1ty,
Thanks for the post and screenshot of that full error. Are you in a particular queue/mode when this happens? Is that something that pops up mid-game, or does this tend to pop up after a match when your stats are coming up?
The steps you've already taken are typically pretty solid to try in similar situations, though as they don't seem to have helped much here we can absolutely pass along this error and make sure the team's aware this is occurring.
It may help to try making sure you don't have any unnecessary programs or processes running in the background as well just to rule out anything else interfering, thanks for hanging in there in the meantime.