Sure does suck watching all these days go by that I cant play in the event because I get a pure white screen when I click the pumpkin. Wish this would be fixed, days ago. Good thing I waited forever since the months ago easter event, just get screwed out of it. I play the regular game all day daily but when I go to the event it is just a white screen and i have to reload. Many messages to the dev and still nothing.
We have answered you what to try, it's hard to figure out exactly what happens on your PC as every setup we've tried - the event works fine. Check your PM again please and try what we've suggested. We can then proceed further investigating the problem depending on your result.
Gotta be scientifically accurate you know.