I have several color themes made, but for some reason I can not get them to sync inside AI... I have tried logging out and back in, as well as syncing my account several times, and still nothing. I can select the Adobe CC tab inside AI and see my color themes, but when i go to color themes is the color themes they're not there.
I am running the latest version as well.
I hope you already found your solution. I'm posting this in case anyone is experiencing this and finds this question.
I found this answer on a different Adobe thread on the same topic and it worked for me.
Delete the com.adobe.illustrator cache folder from User / Library / Caches. It will regenerate when you launch the app again and your color themes should connect.