Linkfire’s smart links are designed to work everywhere across the web, including Facebook and Instagram. However, due to irregular bugs within the Facebook network, you may experience a rare instance where you’re unable to successfully share your smart links on these platforms and get served an 'Unknown Server Error'.
As this issue is generally related to Facebook’s infrastructure, it’s recommended you reach out to Facebook Business Support, who will be able to address any issues in a timely manner. You can reach out to them here: https://www.facebook.com/business/help/support