2. The school is not registered.
3. The system error is the problem of the website itself.
4. Computer problems. It is suggested to report the situation to the school office and solve it by the school office.
1, very easy to solve, just find the right one.
2, it's more troublesome, and you may not get this exam.
3, it is also easy to solve, as long as the system error is corrected.
Just repair the computer or replace it with a qualified computer.