[wp-trac] [WordPress Trac] #42750: Javascript breaks in some backend pages

[WordPress Trac]

#42750: Javascript breaks in some backend pages
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 Reporter:  viajarapie         |       Owner:
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  General            |     Version:  4.9
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:  javascript
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Comment (by viajarapie):

 @adamsilverstein I have a WP 4.9.1 installation in Spanish and a Polylang
 installation with es_ES and en_GB configured.

 My active theme is Lovecraft with a some customizations in a child.

 Below is my list of active plugins. You will notice that several of them
 need an update, they were all downgraded by me to the version they had
 before I had the current problem so everything in my installation is back
 to the last working version except the WP installation itself.


 All In One SEO Pack
 Version 2.4.2.1
 There is a new version of All In One SEO Pack available. View version
 2.4.3 details or update now.

 BackWPup
 Version 3.4.4

 Better Search Replace
 Version 1.3.1

 Breadcrumbs Builder
 Version 1.0.7

 Code Snippets
 Version 2.9.4

 Content Anchor Links
 Version 1.5

 Custom Post Templates
 Version 1.5

 Easy Footnotes
 Version 1.0.10
 There is a new version of Easy Footnotes available. View version 1.0.11
 details or update now.

 Easy Google Fonts
 Version 1.4.3

 Email Subscribers & Newsletters
 Version 3.4.2
 There is a new version of Email Subscribers & Newsletters available. View
 version 3.4.4 details or update now.

 Grid Plus
 Version 1.1.9

 Instant Breadcrumbs
 Version 1.4.5

 Jetpack by WordPress.com
 Version 5.5
 There is a new version of Jetpack by WordPress.com available. View version
 5.5.1 details or update now.

 List category posts
 Version 0.72
 There is a new version of List category posts available. View version
 0.74.2 details or update now.

 Media Library Assistant
 Version 2.62
 There is a new version of Media Library Assistant available. View version
 2.65 details or update now.

 Menu Items Visibility Control
 Version 0.3.5

 Modify Attachments Meta
 Version 0.2

 Organize Series
 Version 2.5.7

 Page-list
 Version 5.1

 Polylang
 Version 2.2.6
 There is a new version of Polylang available. View version 2.2.7 details
 or update now.

 Post Tags and Categories for Pages
 Version 1.4.1

 Recent Posts Widget With Thumbnails
 Version 5.2

 Regenerate Thumbnails
 Version 2.3.1

 Simple Image Sizes
 Version 3.1.1

 TablePress
 Version 1.8.1

 Theme and plugin translation for Polylang (TTfP)
 Version 2.0.1

 Ultimate Post List Pro
 Version 9.1

 Ultimate Responsive Image Slider
 Version 3.1.0
 There is a new version of Ultimate Responsive Image Slider available. View
 version 3.1.3 details or update now.

 Widgets Control
 Version 2.0.3

 Wordfence Security
 Version 6.3.21

 WordPress Importer
 Version 0.6.3

 WP Downgrade | Specific Core Version
 Version 1.1.4

 WP Rollback
 Version 1.5



 Thanks for taking care. At the moment, my site fronted works fine but the
 backend doesn't to the point that I can't post new entries (Add Object
 doesn't work, HTML view doesn't work, tag setting doesn't work either). I
 hope you can find what happens. Anything else you might need from me, I'll
 be happy to help.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42750#comment:4>
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