My my inapp sandbox account can't sign up?

Before today noon, it‘s OK.
but afternoon my sandbox account began return trasactionFail,and I try logout this sanbox account, then I cannot continue my develop work.
I think it's apple's server works wrong.
Anyone else has such issue?
same issue on today
Same issue from today morning, got any solution ?
My my inapp sandbox account can't sign up?
 
 
Q