ReferenceError: jQuery is not defined

[bhartvigsen]

There is a bug in the latest version (Version 5.2.3), it's throwing:

ReferenceError: jQuery is not defined

All over the admin.

To reproduce:

• Setup a web server with Ubuntu, MySQL 5.7, PHP 7.2 and nginx 1.10 using a off-the-shelf wordpress config.
• wget ​https://wordpress.org/latest.tar.gz, extract
• chown -R www-data:www-data <wordpress install folder> and chmod -R g+rw <wordpress install folder>
• Copy wp-config-sample.php to wp-config.php
• Edit wp-config.php and edit ONLY DB_NAME, DB_USER, DB_PASSWORD, and DB_HOST with the credentials for a MySQL user that has full access to the DB in question
• Visit site URL
• Select 'English', provide a username, password
• Login to new installation admin, notice that there are SEVEN fatal JS errors due to jQuery not defined issue

I discovered this on a live site because it broke the 'create page' functionality after an update. After installing a fresh copy with a fresh database I discovered that this is a bug in WordPress rather than a configuration issue.

[peterwilsoncc]

Hi @bhartvigsen and welcome to trac!

I'm unable to reproduce this using 5.2.3, does the issue occur when using a default theme without any plugins enabled?

Many thanks,
Peter

[SergeyBiryukov]

Thanks for the report! However, I could not reproduce it either.

1. Which browser are you using?
2. Could you make sure jQuery is not blocked by a browser extension or antivirus software?
3. What happens if you open the URL directly, e.g. http://mysite.com/wp-includes/js/jquery/jquery.js?

[happy-pillz]

Hi, I think I have the same issue.

Whenever I try to access 'all page' or 'all posts' menus, I get a broken layout. here are screenshots:
​https://wetransfer.com/downloads/8a75b728e251f77600acefe6a411a44f20191017211156/331ebb

When I check the console, I get tens of 'jQuery is not defined' errors.

When I try to edit a post I get the error The editor has encountered an unexpected error

I deactivated all plugins through health-check plugin, used nineteen theme, reinstalled the last wordpress three times, and still got the error.

when I check site/wp-includes/js/jquery/jquery.js, I have a lot of code in the page, starting with:
/*! jQuery v1.12.4 | (c) jQuery Foundation | jquery.org/license | WordPress 2019-05-16 */
!function(a,b){"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this .......

FI, I manage another wordpress site that does not have this issue.

[happy-pillz]

hi again, below more information:

• I deactivated security plugin wordfence and regenerated htaaccess (through settings>permalink>save).

• I can now access 'all pages' and 'all posts', both layouts looks normal, but I still have console errors: Uncaught TypeError: a.widget is not a function, Uncaught TypeError: jQuery(...).sortable is not a function,Uncaught TypeError: Cannot read property 'mouse' of undefined

• I still cannot edit posts and pages, and have the same error: The editor has encountered an unexpected error, with console error jQuery is not defined

• most menus are now broken, like dashboard, settings.

[peterwilsoncc]

@happy-pillz

Thanks for the additional information, are you able to check a few things to help diagnose the problem?

• Does the file site/wp-includes/js/jquery/jquery.js end with jQuery.noConflict();?
• Are you able to access http://mysite.com/wp-includes/js/jquery/ui/sortable.min.js directly?
• Finally, could you please upload a screen shot of your console from the posts screen?

Thanks

[Hareesh Pillai]

Hi @bhartvigsen and @happy-pillz,

I'm unable to reproduce the error either. Can you confirm if you still have the reported issue? If so, please share the details asked above so that it can be diagnosed.

Thanks.

[hellofromTonya]

I'm closing this ticket. However, if the problem persists, please reopen and provide more information to help us further investigate.