Thread:Project:Support desk/Call to a member function addMessage() on a non-object

I'm getting this message with 1.21.1

Fatal error: Call to a member function addMessage on a non-object in PATH/wiki/extensions/EmbedVideo.php on line 84 When I comment the line out it moves to another line with addMessage or to another file with addMessage.

Anyone have advise on how to get my wiki back up and running?