You can try to check the network connection status on your computer to ensure that the network can work normally. If the network connection is normal, you can check whether you have enough rights to log in. You can try resetting the login password or checking whether the account is locked. If all the above methods are useless, you can contact the library staff and ask them to help check whether the network connection is normal.

In addition, you can try to log in with other web browsers, such as Google Chrome, Firefox or Safari, to ensure that you can log in normally. Finally, you can try to use a virtual private network (VPN) connection to ensure that you can access the library website.

In a word, the reasons why you can't log in to the library of Nanjing Institute of Technology may be network connection, permissions or web browser problems. It is suggested that the above methods can be tried to solve the problem.