Thanks for your answer, it seems that the firewall has blocked both things in the office, so anyway I did not wanted to complicate further, I`ve desided to take it on my home, where all the tests passed successfully.
There is somebody who RedHat had to cancel the exam today?
Today I had to take the EX447V35K exam but the exam was not delivered because RedHat had some technical problems(they noticed me at 1 am by email).
Now I try to reschedule the exam, but they did not reactivate it for my account and at my emails, I do not have yet a clear response from RedHat support.
I do not have the details of exam cancellations yesterday. However, if you were notified of a cancellation, there should have been a follow-up email (in less than 24 hours) informing you that the exam eligibility has been restored back to your account and can be scheduled again.
I'll ask around internally to check if your exam has been restored.
I just checked and was informed that your exam was already restored to your account and you have rescheduled the exam for March 5th.
Good luck with your exam!
after a short period of my post, Redhat reactivated my exam and I passed it on 5th March.