Did this just start a few days ago? Or has it gone on for longer than that?

When you say blank page, do you mean completely totally blank, like just a white screen and nothing else? No error message at all?

[edit] JK, I was able to reproduce. Will investigate this further, may take a few days unfortunately.

I have reported this guys. I will let you know when I hear something.

[edit] Not a big update but they are aware of this and will be working on a solution!

This error is occurring as a result of our big PHP upgrade - the old code that BB quests ran on finally became too outdated to work anymore. What we're doing to solve it: finally switching BB quests to the same system that all of our other quests use. We need to essentially rewrite this code so it may take a while. This wasn't something we foresaw and we definitely apologize for the inconvenience while BB quests are down.

Feel free to ask me any questions about this. I know it's frustrating to have a site feature go suddenly poof for an indeterminate amount of time, so the least I can do is let you know it's being worked on, and be here if you have any questions/concerns.

That is a good suggestion and we do try to do that when we can. In this case, I admit we overlooked it because we were dealing with so many things. We are almost done with the Blue Building update so it's not really worth putting up now, but we'll try to keep it in mind for future situations!