可能原因：1、浏览器设置问题，未将门户网站放入可信任站点；2、证书问题，未导入数字校园网站证书。

Possible reason: the account has no access to go further.Solution: 1. Choose the account with access to go on with operation. 2. Contact system administrators for authorization

Possible reasons: 1. Enter wrong account or password 6 time so account is forbidden. 2. The account application is forbidden.Solution: apply to life account ban according to procedures

Possible reasons: 1. Wrong input 2.forget passwordSolutions: 1. Check account information (account is the job number on one-card pass). 2. Reset password according to procedures

Possible reasons: 1. Graduate School has not opened course selection when one is not within course selection period; 2. Student does not opt for a course, therefore there is no class-attending reco...

Possible reasons: 1. there is something wrong with setup of browser, and one failed to put portal into reliable websites. 2. There is something wrong with certificate, and one fails to import digit...