after you fill out the registration - you see a message that the registration is not automatic (everything is like in the 90s), and your registration is not being processed right now. that's why you decided that nothing is working. read carefully what is happening on the screen. this was said, it is said in the instructions.
do not immediately press ok ok ok ok ok - read the messages, they were written so that you would understand what should happen next.

the administrator checks the registrations once a day.