Grant-PnPAzureADAppSitePermission- Access denied

We are getting the below error while running the “GrantAzureADAppPermission” command for Azure App permission using Graph API:

Grant-PnPAzureADAppSitePermission: {"error":{"code":"accessDenied","message":"Access denied","innerError":{"date":"2022-01-21T08:34:00",

"request-id":"ed29a056-7d22-482a-8f3c-c9c97700ec29","client-request-id":"ed29a056-7d22-482a-8f3c-c9c97700ec29"}}}