error on WPMU Dashboard

Hello,

Since today i get some errors on this website saying this :
Notice: Undefined index: _order in /home/inspirationdecor/public_html/wp-content/plugins/wpmudev-updates/includes/class-wpmudev-dashboard-site.php on line 1374
This seems to be just after an automatic update to WP 4.5.3. but not sure.
I'm using Visual Composer as well to build the website (Theme The7) but i can't see the module anymore as well.
I have another website with the same problems.
Thank you in advance for your help to solve this.
Regards
Chris