As you can see below, I got some notifications but if you click on the links, the comment isn't just there.
Unless the poster delete them, which is quite unlikely, you got some issue with the forums

https://www.runitonce.com/poker-training/videos/chris-pimmer-poker-mental-game-view-perspective/

https://www.runitonce.com/poker-training/videos/henry-lister-nlhe-poker-zoom-2-tables-post-commentary/#/comment-290701