Possible reasons are: 1, network problems, solutions, and restarting the router. 2, too many applicants, teacher management information system paralysis. Solution: Wait. 3, the browser is not suitable, try to change the browser.

It may be that there are too many people logging in at the same time, and some people can't get in, but at the same time, the network system will be maintained frequently, and you can log in again after more than an hour.

Hello, this is because your account is restricted and you can only log in at a specific time, that is, during the registration time.