Gentoo added a new set of 17.1 amd64 profiles to the repository in December 2017. These profiles require explicit migration and the old profiles will be depreciated in the near future . The Redcore developer also ran into this problem.
Our final choice was to migrate to the new profile, cross our fingers, work and then ask all users to do the same.
You can find the test version below. I encourage you to install and use it. The Redcore developer says it is very stable.
We will test it and come back with details.
Update: Apparently it looks functional on the first test of the live version, although it has some visual inconsistencies. It took a while to load the "live" version.
Username: redcore with password redcore_live (2101 ALPHA)