[Plugin: Google XML Sitemaps] Error Messages bp-core-adminbar.php -> Settings

Hi i use multisite with buddypress and when i go on the settingspage for the plugin it shows a lot of Notice: errors:

<b>Notice</b>: Undefined property: stdClass::$id in <b>/var/vhosts/DOMAIN/htdocs/wp-content/plugins/buddypress/bp-core/bp-core-adminbar.php</b> on line <b>221</b>

<b>Notice</b>: Undefined property: stdClass::$current_group in <b>/var/vhosts/DOMAIN/htdocs/wp-content/plugins/buddypress/bp-groups.php</b> on line <b>242</b>

<b>Notice</b>: Trying to get property of non-object in <b>/var/vhosts/DOMAIN/htdocs/wp-content/plugins/buddypress/bp-core/bp-core-adminbar.php</b> on line <b>78</b>

<b>Notice</b>: Undefined variable: grouped_notifications in <b>/var/vhosts/DOMAIN/htdocs/wp-content/plugins/buddypress/bp-core/bp-core-notifications.php</b> on line <b>49</b>

Any Ideas? Plugin Works. Version 4.0beta6

http://wordpress.org/extend/plugins/google-sitemap-generator/