We have identified the course of the issue and we are working on a fix. We have fully disabled sharing link export functionality for the moment. Our current ETA for a fix is Friday 17th April 14:00 UTC.
Existing sharing links that have already been generated and saved to your base will continue to work. If you are missing a few sharing links due to this outage you can manually generate them using the process outlined here: https://help.stacker.app/en/articles/3731038-sharing-links