Found the fix to the issue above - Error During Uploading Document

I was getting the same error...So what I did is I went to the SITE ACTIONS for docs.contoso.com on CONTOSOSRV02 with local administrator credentials.- Site Actions / Site Settings / People and Groups- Click NEW / Add User and then I added the CONTOSO\Domain AdminsAnd then I was able to access the website from CONTOSRV01 using Contoso\Administrator and in HTTPS.Hope this help others that may have the same issue