Lol… I just had the same problem and I figured out how to get it working for me.
Nothing I did would let the font show up in CC, but it showed up fine everywhere else.
The fix was:
Right-click the font file, and select the “Install for all users” option (with the “admin” shield next to it.)
Then close and re-open CC, and it sees my font now.
I’m guessing the CC process does not have permissions to see the new fonts unless it’s installed for “all users” in Win 10.