Hover a thumbnail on youtube.com and click an icon at the right: "Not interested" and "Don't recommend channel"
< Feedback on YT: not interested in one click
I guess youtube is serving the old version of their site to you and my new code incorrectly detects it. I don't know how to fix it as I don't know how to switch to the old version of the site. Use the old version of the script for now until you get a new version of the site.
New versions not working for me.
Old version (v1.2.28) works fine.