FV WordPress Flowplayer plugin crashing entire site with Fatal Error

Hello,

I’ve had to deactivate the plugin, because when it is activated, the entire site crashes. The website just is all white with this black text at the top:

Fatal error: Cannot use object of type WP_Error as array in /home/poncho/public_html/here/wp-content/plugins/fv-wordpress-flowplayer-master/controller/backend.php on line 475

The site goes back to normal when I disable the plugin via FTP (i have to rename the plugin folder). Then I can get back into the admin backend side of wordpress.

This started happening a few weeks ago, so I thought it might be a wordpress issue: we were currently running and old version of wordpress (3.8.6)- (we are also having updating problems in the back end) so when I managed to update to wordpress 4.4.1, I was sad to find that the plugin was still behaving the same way.

When I try to update the plugin manually via FTP, the same thing happens.

this is our website:
http://www.poncho.tv

and here is a post where we have used the plugin:
http://www.poncho.tv/music/top-5-songs/top-5-songs-vol-56/

I’ve tried looking through the support documents (though I’m sure I’ve missed some) – but I can’t find a clear solution to our problem.

Please help us!
Cheers,
Amelia