What does it mean when you can't comment on someone's Facebook post?
So, if you're unable to post a comment, it may be due to a lack of permission for that specific Facebook page. Although you will still be able to see the post and other comments, you will not be able to participate since you are not a part of that customized group that is given that particular reign.
Options for social media managers
Hiding the Facebook comment will keep it hidden from everyone except that person and their friends. They won't know that the comment is hidden, so you can avoid potential fallout.
If you do not see any comments on a Facebook post, it might not be an error but a policy measure. Sometimes, Facebook administration itself may temporarily block specific actions like writing comments on it if: Their security systems considered any of the publications suspicious or inappropriate.
Go to the public post on your profile that you want to change who can comment on it. Click the three-dot menu icon in the top right of the post. Click Who can comment on your post? Select who is allowed to comment on your public post from any of the three audiences listed above.
The post has had commenting turned off, or limited to selected people. Instagram is down (it's rare, but you can check here). You are over-engaging (likes, comments, follows, unfollows). You included more than 5 @ mentions in a single comment.
Blocking someone from commenting to you also hides your posts and activity from the selected user. You'll remain in the user's Facebook friends list and he'll still be able to see other content on your profile page.
All Page admins and post authors can hide comments on Facebook. So, every time you comment on someone else's post, there is a chance that your comment will be hidden. The only place (on Facebook) that is completely under your control is a Page that you admin and your private timeline.
The comment's text should fade or appear grayed out. You will notice the Unhide option below it which can be useful if you change your mind later. The same steps will also work on smartphone apps. Press and hold the comment to reveal a pop-up with the Hide comment option.
The reason why you are seeing “1 comment” but nothing showed up is because: That particular user who commented has a privacy level where he/she is invisible to public (which means if you are not a friend to that user, you cannot see their comments)
You can turn off comments using both the Facebook website and mobile app. Just note that to change who can comment on a post, that post's visibility needs to be "Public." If it's set to "Private" or "Friends," you can't turn off comments. 1. Open Facebook and head to the post that you want to turn comments off for.
What happens when you block someone from commenting?
When you block someone from commenting, they can still view your photos and videos. Any new comments from them won't be visible to anyone else except for them. Tap or your profile picture in the bottom right to go to your profile.
When you add someone to your Restricted list, you'll still be friends with them on Facebook, but they'll only be able to see your public information (example: your posts and profile info you choose to make public) and posts you tag them in.

When you post something on Facebook, you can use the audience selector to choose who can like or comment on it. If you create a public post, by default everyone can like or comment, even people who aren't following you. However, you can change who can like or comment on your public posts in your follower settings.
If you don't see any comments under a friend's pic, there are several reasons. The account owner may have blocked the comments on that particular post. Instagram users can disable the option to receive comments on their pictures. It is by going to the post options and turning the comments off.
When you block somebody, they won't just not be able to post on your timeline. They won't be able to see anything you post on your timeline, tag you, send you an invite, try to friend you, or start a conversation with you. And if you're already friends with them, you'll unfriend them as well.
People aren't notified when you block them. After you block someone, their likes and comments will be removed from your photos and videos. Unblocking someone won't restore their previous likes and comments.
Profiles won't be notified when you block them.
To disable comments on a Facebook post (Mobile App): Go to the desired post on your profile for which you want to restrict the comments. Tap the three-dot option on the top-right corner of the post. Tap on 'Who can comment on your post?'
Log into Facebook from a computer. Go to your Page's post that has a commenter that you want to block. Hover over the photo of the commenter, then click . Select Block.