Can't log onto demo it gives me a crash report

When I try and logon I first get that it is an unknown publisher.
Then I log in and choose demo mode.
Then the screen looks like it is loading and it flashes a few times and then I get a crash report
My son has likes this and wants to buy this game but I don't want to spend the money when it is appears to no longer work on his computer. I had ticket 33518 opened but they closed it but my problem is STILL not resolved. I have attached todays crash report.