Cognizant Technology Solutions — Offer accepted and after 2 days revoked by Cognizant

I received the offer letter from cognizant on 29-Mar-2021 and accepted it onecognizant portal on 30-Mar-2021. It's just 2 days only and today on 01-Apr-2021, I got a call from HR that we are revoking the offer and take back your resignation from current company as we are not getting project from which we are taking you. I hope there must be strong reason behind this. I would have faced the bigger financial issue if my current organization did not accepted the revoke of resignation. It's hard to believe back in cognizant if they give me offer again due to same reason it might lead me jobless in future. WHY REPUTED COMPANY LIKE COGNIZANT HAVE DONE THIS.