Maybe there's a glitch in the app or a connectivity issue. Try restarting both apps and your device to see if that helps.
Sometimes, it's because of updates or changes in the platform's policies. Make sure your apps are up to date and review the terms of service for any new restrictions on sharing.
Maybe there's a technical glitch or a compatibility issue between the two platforms. Sometimes updates or server problems can cause this.
Maybe there's a technical glitch or a problem with your internet connection. Check those first.
Maybe there's a glitch in the app or your internet connection is unstable.
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 the app is having some glitches or is undergoing maintenance. Try again later.
Maybe there's a technical glitch. Sometimes, Instagram's servers can have issues that prevent sharing.
Maybe there's a technical glitch in the app. Try restarting your device or reinstalling the Instagram app.
Maybe there's a technical glitch or a problem with your internet connection. Try restarting the app or checking your network settings.
It could be that the content you're trying to share isn't compatible with FB story. Or, there might be an update issue with the FB app. Check these aspects and see if it helps.
It could be that your account settings are restricting the sharing feature. Check your privacy and sharing settings to make sure they allow for this action.