Yes, there might be. Check if you have the correct permissions for sharing on the app. If not, enable them. Also, restart your device. Sometimes, a simple restart can solve glitches that prevent sharing.
It could be that your account settings are restricting the sharing feature. Check your privacy and sharing settings to make sure everything is enabled correctly.
It could be that your account settings are preventing the sharing. Check your privacy and sharing settings to make sure they allow sharing to your story. Also, make sure the post you want to share is allowed for such sharing.
Sometimes, the platform might be undergoing maintenance or experiencing technical issues. Wait for a while and try again later. Another possibility is that the post you're trying to share doesn't meet the platform's sharing criteria.