Comments not working

I’m using a Radius child theme but the comments are not working. There are 2 comments there and I’m not even sure how they got there. When I click on comments (home page is post page) I get a 404 error. And the comments form is not appearing below the post.

I have compared the content.php; content-page.php, comments.php files between the one in my child directory and the original and can’t see what’s missing.

https://evolutionstudio.ca