Only possible to select playable nations.
Update jQuery.
Update to {Track.js} 1.2.5.
Fix "Uncaught TypeError: Cannot call method 'scrollIntoView' of null" Javascript error message found with {Track:js}.
Fix (Uncaught Error: cannot call methods on dialog prior to initialization; attempted to call method 'close') Javascript error, reported by {Track:js}.
Fix 'a is null' error message in show_goto_path.