Changing the author for any discussion is giving me blank page

When i go to the back and try to change the author on any discussions, and i click save and close the page break and become white with this errors:

Notice: Trying to get property of non-object in /home/mywebsite/public_html/plugins/finder/easydiscuss/easydiscuss.php on line 96

Warning: Creating default object from empty value in /home/mywebsite/public_html/administrator/components/com_finder/helpers/indexer/adapter.php on line 557

Catchable fatal error: Argument 1 passed to plgFinderEasyDiscuss::index() must be an instance of FinderIndexerResult, instance of stdClass given, called in /home/mywebsite/public_html/administrator/components/com_finder/helpers/indexer/adapter.php on line 330 and defined in /home/mywebsite/public_html/plugins/finder/easydiscuss/easydiscuss.php on line 111

I'm using: Version: 3.2.9744

p.s I just realise you don't have to change anything. Just open the discussion and then click save and close and the page brakes. It's the same when I click only save