Page Builder 
Widgets Bundle 
SiteOrigin CSS 
Installer Page builder doesn’t work properly after updating to WP 3.9
Same problem https://wordpress.org/support/topic/page-builder-menus-grayed-out?replies=10
When trying to edit a widget on an existing page, the widget opens but is ‘grayed out’. It doesn’t appear in a lightbox and I’m unable to click on anything (forced to refresh the page).
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10There are 2 things you can try to fix this. The first is to hard refresh your browser cache. Sometimes old CSS/JS files are cached and this causes issues.
http://www.refreshyourcache.com/en/cache/
But more than likely, this is some sort of plugin conflict. Can you follow this guide and see if you can fix the issue. Note that you’ll need to hard refresh after disabling each plugin.
https://siteorigin.com/troubleshooting/identifying-plugin-conflicts/
I found that “WP Frontpage News” plugin makes conflict with “Page builder”. When I deactivate that plugin, Page builder works.
How resolve this problem?
You could contact the plugin author and ask them if they might make their plugin compatible with Page Builder. You might also consider using the Post Loop (PB) widget in it’s place.
Okay, but is it possible with Post Loop widget insert posts from specific category?
It is. Use the Additional field to insert an argument like
Where x is the ID of the category you want to filter by.
Thank You! :)
Not a problem.
Same problem ‘grayed out’ after update. In my case conflict with Easy Bootstrap Shortcodes plugin. Pity, both are useful…
I Have the same issue I took every single plugin and It’s still freezes I don’t get it.
I’ll help you on your thread.
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