There are several reasons. Maybe your account has some restrictions, or the IG platform is undergoing maintenance. Another possibility is that you haven't updated the app to the latest version.
It could be that your IG app is outdated. Try updating it to the latest version and see if that helps.
Maybe your internet connection is unstable. Check if your Wi-Fi or data is working properly.
It could be that the app is having some glitches or is undergoing maintenance. Try again later.
Maybe there's a problem with your internet connection. Check if it's stable.
It could be that your account has some restrictions or you don't have the necessary permissions to share to your story. Also, make sure the content you're trying to share complies with IG's guidelines.
It could be that your device doesn't have the latest version of the Instagram app. Check for updates and install if needed. Also, make sure you haven't reached any limits on adding stories set by Instagram.
Maybe there's a problem with your internet connection. Check if it's stable.
Maybe your account doesn't meet the promotion requirements or there's some issue with the content you're trying to promote.
Maybe there's a problem with your internet connection. Check if it's stable.
Maybe there's a glitch in the app. Try restarting your device or reinstalling the Instagram app.