UNREAL ENGINE Website have some problems!

When i try to modify my profile information’s i always get this error: You have entered an invalid Birthday.

I already try Google crome,Firefox,Opera and another laptop with windows 10, I always get the same error.
I find that other people had the same problems.

I also have problem that i can’t upload Attachments!
I also try to use my girlfriend account and everything seem to be working fine, I believe i have a problem with my profile.