I have been in contact with the WP Bakery team regarding the issues between Visual Composer and Backup Buddy (There was an error when trying to back up my site), and the following seems to be the error, which has got to do with your theme.
Please read their answer and I hope your development team can fix the code in your theme asap:
“Ok by investigating an issue source, we found that something trying to enqueue script composer-atts when it is not needed.
where wpb_js_composer_js_view and wpb_js_composer_js_custom_views is enquing without needs. I mean that theme “royal” author should remove this dependencies or fix code.
I also think that this file simply must not be enqueued in all admin pages – just only “edit page or new page”.
Might this also be the issue why the theme is running/loading so slow?
“Can you please contact theme author and ask to dequeue script from unnecessary places (admin.js as I told is not needed everywhere only on edit/add page not in backup bage for example – this can in future cause same js errors).
It would be really great if your development theme can take a look at this..