Grid Media Library Won't Load in 4.0 w All Plugins Disabled

[johnstonphilip]

Upon upgrading to 4.0, on 10 of my WP installs, everything is working perfectly.

However, in 1 of my installs, I can't get anything to show when the Media Library ("Dashboard" > "Media") is set to "Grid" mode. Rather, the spinner wheel just spins forever.

It DOES load correctly when I have it set to "List" mode.

I have WP_DEBUG mode on and no errors are showing. There are also no javascript errors showing in the console on Google Chrome.

Steps I have taken already:

• I have de-activated all plugins and reverted to the twenty fourteen theme
• I checked the server to make sure there is enough RAM, Hardrive space, and other resources.
• I checked permissions in apache and all are set to be owned by apache
• I restarted Apache
• I restarted the entire server (which is a LAMP setup)
• I have reverted to 3.9.2 and back to 4.0 multiple times (there is no "grid" mode in 3.9.2)

[ocean90]

Hey, can you please check the response of the AJAX request?

• Enable WP_DEBUG
• Open Chrome's DevTools
• Go to wp-admin/uploads.php
• Switch to Network tab and set filter to XHR (​https://cloudup.com/ijJ4IYtHCSh)
• Reload page
• Select admin-ajax.php and switch to the Response tab

[johnstonphilip]

Hey thanks for sending that. Here is what it is showing:

Notice: Trying to get property of non-object in /var/www/vhosts/creativeready.com/wp-includes/media.php on line 2646

Notice: Trying to get property of non-object in /var/www/vhosts/creativeready.com/wp-includes/media.php on line 2650

​http://cl.ly/image/1F2i1r0S0i2q

[SergeyBiryukov]

You have some images attached to non-existing posts.

Normally, wp_delete_post() makes sure not to leave orphaned images​.

Still, we should check if the parent post exists, like we do in class-wp-media-list-table.php​.

See 29566.patch​.

[johnstonphilip]

Good call Sergey - thanks!

P.S. do you know if there is a way I can filter media to show items like that: that are attached to a post which has been deleted?

[SergeyBiryukov]

In 29724:

Avoid PHP notices in media modal caused by orphaned attachments.

fixes #29566 for trunk.

[SergeyBiryukov]

Reopening for 4.0.1.

[Frumph]

@SergeyBiryukov

Additional possibly related. Contributor role granted upload_files, grid view ajax in add media not showing uploaded images.

Media library - view all - grid view / not showing uploaded images, list view showing images.

[nacin]

In 30259:

Avoid PHP notices in media modal caused by orphaned attachments.

Merges [29724] to the 4.0 branch.

props SergeyBiryukov.
fixes #29566.

[JesperT]

I got the same error and discovered that in my functions.php used the wrong hook to run remove_menu_page.
(admin_init instead of admin_menu)

[joemcgill]

#34662 was marked as a duplicate.