I can't do feedback/ask questions on a presentation

I can do it for all of the presentations except this one: 文法文化が全く異なる言語を習得するためのコツ – 日本語話者のケースを自分に適用してみましょう. Yeah, it’s in Japanese. Is it because my Japanese is only intermediate that they don’t want me writing a comment or maybe it’s a bug with the site?

@polyglotconference can you fix this? Same thing with Kevin’s italki talk, the comments section is missing