The example posted for that command is one that is done by someone in the forum, not by an AppGameKit programmer/document writer.
EDIT: I suspect the moderators test posted examples in the IDE, but not necessarily on a Player.
I just tried my own suggestion. And it failed in both the v1076 and v10815 Players.
But it appears that the OpenBrowser causes a problem in a Player. I vaguely seem to remember that from before.
Maybe someone at TGC can weigh in on this?
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master