Maybe it's against the platform's rules or privacy settings. Some social media platforms don't allow reposting others' posts without specific permissions.
Posting someone else's content without permission is usually against the rules and ethical guidelines of most social media platforms. It can lead to copyright infringement and violation of privacy.
First, check the privacy settings of the post. If it's set to not allow sharing, there's not much you can do unless you ask the original poster to change the settings. If it's a platform issue, look for any error messages. They might give you a clue on what's wrong.
It might be due to the fact that the post is set to private or only viewable by a specific group. If it's not meant for a wider audience, you won't be able to put it on your story. Also, some platforms have algorithms that prevent sharing if they detect something fishy, like if it seems like spam or misinformation.
Sometimes, the platform has certain rules or restrictions on sharing certain types of posts. It might be that the post you're trying to share doesn't meet the criteria for sharing on your story.
There are several reasons. Maybe the person who made the post has restricted sharing. Also, your account might not have the necessary permissions or there could be a bug in the app's functionality.