SnapShot Does not Seem to Work for Local, Google Drive, or Managed Backup

I do not seem to be able to get Snapshot to work on downtown-la-dentist.com dev site. I tried local backup, which may or may not work since I see files in FTP but not in Snapshot, so I am not sure if they are valid since the process ends in error displaying not found page of the site. Managed backup option seems to throw an error when it gets to last stages. And backup to Google drive does not work because while I did not configure a new app with new set of credentials as per instructions, when I try to authorize to generate the token, Google throws an invalid 0auth client error. Help? I am running some godaddy backups but they seem less convenient