Hello student this might happen because of some technical glitch I request you to please clear your cache and then try to log in also use another browser if same issue occurs.

Incase if you face same issue you can contact ICAI helpline for the same.

0120-3054 851 / 852 / 853 / 854, 0120-4953 751 / 752 / 753 / 754 . Email : advanceditt.technicalhelpline@icai.in

For more details refer to the link mentioned below - https://www.google.com/url?sa=t&source=web&rct=j&url=https://advit.icaiexam.icai.org/index.php%3Fp%3Dcontact_us%26Token%3D%23:~:text%3DThe%2520Institute%2520of%2520Chartered%2520Accountants%2520of%2520India%26text%3D0120%252D3054%2520851%2520%252F%2520852%2520%252F,Email%2520%253A%26text%3DFor%2520technical%2520related%2520queries%253A%2520advanceditt.technicalhelpline%2540icai.in&ved=2ahUKEwivvq2W5ZHtAhWaWX0KHXziClIQFjABegQIARAE&usg=AOvVaw0QFTwfk-h7uhvNbSCq7l5M

Feel free to comment if you've any doubt

Good luck