Hmmm, have you tried playing FfH on BTS yet? this version of WH is using FfH as a codebase, so if you cant play FfH either it must have something to do with their code, otherwise if FfH does work, it has to do with something Ploe changed... im just speculating here... but if that is the case then it narrows it down a fair bit.
also are you using the soundtrack? (dosnt look like there is a link, but anyway

)
i assume the same error pops up for every civ you chose?
anyway, thats all i can think of (i have no idea what im talking about, im useless at coding etc so just disregard it all if its wrong

) we'll have to wait for Ploe to check it out.