The problem is in the pearson vue. But they could not solve my problem.
I solve my problem when I sent an email to firstname.lastname@example.org
(in my case, because I live in brazil)
with the following prints
1 - I trying shedule the 1z0-866 exam ( erro message)
2- Open the 1z0-865 test and took the print of the success message to upload assigment
3 - the 1z0-865 test status in progress. (The correct and pending)
If not solve your problem. Post again here. I will help you.