Fixed in the current ZIP. This only occurs if you visit VaultWiki: General Settings while you have no forums that can contain group pages. This can be fixed by modifying
vault/special_admin_options.php. Find:
PHP Code:
$forumchoice = construct_wiki_chooser('', -2, 1, '', $foruminfo['forumid'], true, true);
Replace with:
PHP Code:
$forumchoice = construct_wiki_chooser(array(), -2, 1, '', $foruminfo['forumid'], true, true);