Hello Aspirant,

Firstly, make sure that the number you have entered is your Aadhaar number. Cross-check it.

Make sure it is a 12-digit number and has only digits in it and the alphabet in it.

The aadhaar number is a 12-digit arbitrary number handed out by the UIDAI to the citizens of India after fulfilling the validation method done by the council.

Any person, without taking age and gender into consideration, who is a citizen of India, may willingly achieve an Aadhaar number.

For more information click here

https://medicine.careers360.com/articles/indian-army-bsc-nursing-application-form

I hope it helps.

Thank you.