The core issue for this was resolved many months ago and that corresponds with the drop off in posts once that patch went live. This thread has only been remaining active because some of the same folks keep coming back to bump it.
At this point if you are still experiencing issues and your system meets all the requirements to play the game. You should put in a ticket to allow for more direct troubleshooting. (Click your name at the top of the page, click support, click contact support.)