Cognizant — Cognizant Application on hold

Hi,

I had given interview at cognizant on 02/Aug/2021. I had cleared the interview. Got the confirmation from HR. After that on 06/Aug/2021, I had attended the pre hire orientation session too. HR ask me to sent the documents, details etc all I had sent by the eod. After 2 days she had call me saying that my application on hold. Still I did not get an offer letter. HR told me that she can not onboard.