You might have created a password while applying initially. So use that password. Alternatively, clear cache of your browser and try again. You can also click on forgot password option and they will give you an option to re create your password using email/phone or both.

If it is showing invalid, there can be reasons like:

You had entered the different password, try correcting it by checking caps lock.

If you don't remember your password you can reset by going to the login page.

If password is correct you can check the email address once again .