Problem with Visual composer on 4.1

Hello,

First of all thank you for your work, this plugin is really the best ones to display opening hours on WP website.
My problem appears since the WP 4.1 update. I’m using a theme with visual composer included, when I try to edit an existent page, the visual composer interface doesn’t show up but when I create a new page, no problem. It only works when I deactivate your plugin so my question is, could you help with the error below, it happens when I launch the page I want to edit :

Error: no such method ‘instance’ for menu widget instance
http://www.xxxxxx.com/wp-admin/load-scripts.php?c=0&load%5B%5D=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,postbox,plupload,json2,farbt&load%5B%5D=astic&ver=4.1

Thanks for your help and for your great work

https://ww.wp.xz.cn/plugins/wp-opening-hours/