I clicked on edit post and selected enable comment on that specific page but when I look the page then it is still comment blocked. How do I that?
that's possible, refresh page first, but am as a WordPress theme developer, it can be the theme fault. Which not programmed well. try another theme and refresh
I suggest clearing your cache, then go to Edit Posts and make sure that the comments are enabled. Make sure you save the changes and then go to your website and check the page if it now allows comments. Hope that helps. Have a good day!