The Visual Composer backend editor keeps loading when WooCommerce Bookings is activated. I guess there might be the compatibility issues.
Current version installed on my website:
- Wordpress: 4.6.1
- WooCommerce Bookings: 1.9.13
- Visual Composer: 5.0
I also tried to update Wordpress and Plugins to latest version but I got the same error.
However, the Wordpress and plugins works fine on my localhost MAMP.
Should it be the settings on server?

WooCommerce > System statuswhat do you get as information for both installations… Just try to see the differences between your local server and your online server. May be you will be obliged to change of hosting to get this plugin combination working fine… Also this could come from your theme, so check also if you get some errors in your browser DEV Tool's console. - LoicTheAztec