If you receive the following error and are not using a proxy, and do not have Fiddler open, you might have some mixed case somewhere in your certificate name configuration settings:
1:55:36 PM - Warning: There are package validation warnings.
1:55:36 PM - Preparing...
1:55:36 PM - Connecting...
1:55:38 PM - Uploading...
1:56:25 PM - Creating...
1:56:42 PM - HTTP Status Code: 500/nError Message: The server encountered an internal error. Please retry the request./nOperation Id: {GUID}
1:56:43 PM - Deleting Quality Assurance Debug Only - Website
1:56:44 PM - There was no endpoint listening at https://management.core.windows.net/{GUID}/services/hostedservices/website/deploymentslots/Staging that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
1:56:44 PM - Deployment failed