Dufficulty in registering as CA on incometax portal

My name is Aashu Goyal. I have completed my CA in 2019. Now i want to register as CA on new incometax portal. While I enter my enrollment date while registering, it shows enrollment date is invalid. My enrollment date is 10.10.2019. I dont know why this error is occuring. Please let me know how i can solve this issue, so that I can register myself as Chartered Accountant of incometax portal.