There are several possibilities. It might be that the links you're trying to share violate Facebook's community standards, or your internet connection is unstable. Also, sometimes updates to the platform can cause temporary sharing issues.
Maybe it's because you've enabled the sharing option in your Facebook settings.
Maybe there's a copyright issue. Or it could be that the platform you're using has certain restrictions.
There could be several reasons. It might be that the story format doesn't support links, or there could be a problem with your account settings. Also, the website or app you're using might have certain criteria that need to be met before allowing link additions.
It's possible that in 2020, the specific story format or category you were working on had limitations on adding links. Maybe the platform was undergoing updates or had certain security measures in place that prevented link additions.
Maybe it's against the platform's rules or your account doesn't have the permission to do that.
Could be that the format or content of the links isn't compatible with the story platform. Also, some sites have restrictions to prevent spam or inappropriate links. You might want to double-check those factors.
It could be that the format or settings of the platform you're using don't support adding links. Or there might be specific guidelines for the type of content you're creating that prohibit links.
Maybe there are platform restrictions or rules preventing it. Check the terms of service of the platform you're using.
Maybe there's a technical glitch or your platform doesn't allow it for certain types of stories.
Another possibility is that your account doesn't have the necessary permissions or you haven't completed certain setup steps required for adding links. Look for settings or instructions related to link functionality.