ownCloud Server version 10.0.5 was built and published on our download servers.
However some critical issue was found where the admin page cannot be displayed: https://github.com/owncloud/core/issues/30246
Some distro packages were already published at that time and have now been reverted back to 10.0.4 there for the time being.
We are working to release 10.0.6 as soon as possible with a hotfix.
Stay tuned.