where can I update our twitter link, it seems to have gotten broken

Social account connections can be updated from the Notifier application (blox menu -> Community -> Notifier), then open the settings panel (gear icon in upper right to the right of your "signed in as").

Look for the "Social accounts" panel. Remove the existing connection, then re-add the new one. You'll need to be able to log into your X account in the same browser with the account you want to connect.