That fixes the depreciation issue. Not the issue with being out of memory. For that you need to configure your server or talk to your host.
Are you still seeing
Warning: Declaration of vBForum_Item_SocialGroupMessage::getLoadQuery() should be compatible with that of vB_Model::getLoadQuery() in ..../packages/vbforum/item/socialgroupmessage.php on line 261
Warning: Declaration of vBForum_Item_SocialGroupDiscussion::getLoadQuery() should be compatible with that of vB_Model::getLoadQuery() in ..../packages/vbforum/item/socialgroupdiscussion.php on line 337