hello aspirant,

you do not need to worry about it, try to download it by using the correct email id and password and if you think that the details are not correct, you can use your phone number to verify and set new passwords. still, if this does not work, try after some time.

make sure that you follow these correct steps-

1. Visit the official website.
2. Click on the link to download NATA 2020 admit card .
3. The login page will open. ...
4. Immediately after login admit card will display on the screen.
5. Download the admit card and take multiple printouts.

hope that helps