Old shares are no longer valid as the servers have new short addresses.
As we have already written, one of the innovations of the latest update is the short addresses of servers. Whereas previously the server address consisted of a short game name, IP or domain and the server port, it is now simply /en/s/ServerID.html
Unfortunately, all shares that were made before the update using long addresses are no longer valid.
This means that you have to share the link to your server again.