Hey,

This issue is being faced by many people, so don't be disheartened. Wait till tomorrow as the admit card has been released just today. There might be some technical issue.

Also, just login using your application user ID and password and see if the admit card download is possible or not.  Try again tomorrow. Also, you can contact the helpdesk incase you aren't able to download it.

For more details, please check the link below:

https://www.google.com/amp/s/medicine.careers360.com/articles/neet-pg-admit-card/amp

Hope this helps!