calling web api in Sharepoint Framework with Aad client lib through Azure?

I hope you're doing well. I'm stuck in an issue because I'm doing it the first time. I made a web API in Microsoft Azure tenant after calling in my SPFX Environment with Aad Client lib but I'm facing this issue. Kindly If you know the any possible solution then guide me.I'm following this link https://docs.microsoft.com/en-us/sharepoint/dev/spfx/use-aadhttpclient. after receiving these errors mentioned above then got a few things but token acquisition failure still remains.

I'm following this syntax in my code.

Manifest file code:
package-solution.json

"webApiPermissionRequests": [

      {

        "resource": "SaintGobain-Service-API",

        "scope": "Sites.FullControl.All"

      }

    ]