Please confirm, if you are able to see the 'liked videos' in the liked videos page? Also, clearing your browser's cache & cookies and updating or reinstalling the app often fixes most issues. You may also try using a different browser and keep us posted.
@TeamYouTube My channel was initially demonetized two month ago for sexually explicit contents . i had 53k subs, more than 15 million viewers and over 200 videos did not have a single video of sexual content. after waiting two months you tube again disapprove due to duplication??