Hello Aspirant,

This issue is raising because you might have entered the incorrect login credential and hence it is not accepting i so you can do one thing, just open your mail box of that e-mail which you gave on the time of registration and you have received a mail from VIT stating your application number and other details. You can get those details from their and if password is wrong then you can click on forgot password/reset password button to change the password.

By following the above steps your issue will be resolved. If persists please ask in comment section.

Good Luck!!