emacs installation

The installation on 13.1 breaks down: I got this by YaST2: Software installation

The installation has failed. For more information, see the log file at /var/log/YaST2/y2log. Failure stage was: Adding Repositories
Error Message

An error occurred while attempting to subscribe to the required repositories. Review the yast2 logs for more information.
The following repositories could not be added

• http://download.opensuse.org/reposit...:/Ports/extra/

It also says: Installation error: An error occurred initializing software repository
Details:
onpenSUSE 13.1: Ports: [1] Valid metadata not found at specified URL history
[1] Repository type can't be determined.

What's missing and how can I get it? Thanks!