I'm guessing they are just trying to fix/reload content from behind the scenes. Hopefully, adding any missing episodes and it looks like the later seasons. Hopefully, it will all be resolved within a day or so.
There is now a link for S12. Links for S03-S06 and S10-S11 have also been posted. On January 7, links for S01-S09 were posted, and the show became available (for 16 hours) on Monday, January 8. Hopefully this means the show becomes available after midnight ET, but if not, possibly sometime this week.
Now that CBS has put up all of My Three Sons, I wonder if December Bride could be next? How many other syndicated TV shows from their library (with more than 100 episodes) have remained absent all these years?
Great news and I hope this doesn't get taken down after a year like 12 o clock high. I like to view series 1 or 2 episodes a week. I had just finished season 1 of 12 o clock and then it was gone.