To install or configure any new OES service, OES media should be available and the priority should be higher than the OES pools repositories. This issue occurs when the OES media is not available or the media has lower or equal priority than the OES pool.
To resolve this issue, add OES media. If the problem still exist, run the following command to increase the OES media priority.
zypper mr -p <priority> <OES_medianame>
For example, zypper mr -p 98 OES_media