[5.x]: Just updated to 5.8.21 from 5.8.11, admin panel broken.

[23d1]

What happened?

Description

Just updated to 5.8.21 from 5.8.11, and it broke the admin panel... Things are not loading in dashboard, entries, and so forth. I can navigate to "Updates" which also doesn't load anything. Luckily the site is still live and working, but it's impossible to update.

Developer Inspector Console errors output;

Failed to load resource: net::ERR_BLOCKED_BY_CLIENT
iframeResizer.js?v=1764959905:1 
IFRAME-RESIZER

Iframe-Resizer 5 is now available via the following two packages:

 * @iframe-resizer/parent
 * @iframe-resizer/child

Additionally their are also new versions of iframe-resizer for React, Vue, and jQuery.

Version 5 of iframe-resizer has been extensively rewritten to use modern browser APIs, which has enabled significantly better performance and greater accuracy in the detection of content resizing events.

Please see https://iframe-resizer.com/upgrade for more details.

cp.js:1  Failed to load resource: the server responded with a status of 404 ()
entries:648 Uncaught TypeError: Craft.createElementIndex is not a function
    at entries:648:36

and

Uncaught TypeError: Craft.escapeHtml is not a function
    at label (footer:1723:33)
    at S.item (footer:1776:51)
    at S.render (selectize.js?v=1764959905:2:41281)
    at S.<anonymous> (selectize.js?v=1764959905:2:31132)
    at C (selectize.js?v=1764959905:2:7814)
    at S.addItem (selectize.js?v=1764959905:2:30940)
    at S.addItems (selectize.js?v=1764959905:2:30820)
    at S.<anonymous> (selectize.js?v=1764959905:2:21740)
    at C (selectize.js?v=1764959905:2:7814)
    at S.setValue (selectize.js?v=1764959905:2:21686)
jquery.js?v=1764959905:2 Uncaught TypeError: Craft.formatInputId is not a function
    at s.constructor.init (MatrixInput.js:42:36)
    at s.constructor.constructor (Base.js:20:15)
    at s.constructor (Base.js:32:21)
    at new s.constructor (Base.js:32:21)
    at footer:2908:15
    at HTMLDocument.<anonymous> (footer:2909:3)
    at l (jquery.js?v=1764959905:2:26867)
    at c (jquery.js?v=1764959905:2:27169)

Steps to reproduce

1. Update to 5.8.21

Expected behavior

Just work

Actual behavior

Breaks the admin

Craft CMS version

5.8.21

PHP version

8.3.6

Operating system and version

Ubuntu Linux 6.8.0-88-generic

Database type and version

MariaDB 10.11.13

Image driver and version

Imagick 3.7.0 (ImageMagick 6.9.12-98)

Installed plugins and versions

• Button Box 5.0.1
• CKEditor 4.11.0
• Cloudflare 3.1.0
• Code Field 5.0.1
• Craft Range Slider 5.0.0
• SEO 5.0.0
• Blitz 5.12.5 (disabled)

[linear[bot]]

CMS-1710

[brandonkelly]

Try deleting your vendor/ folder, and then running composer install. Does that help?

Also try restarting your web server.

[23d1]

Just tried that, as well as clearing the storage/runtime/ folder, same issue(s) persist.

[brandonkelly]

Try running craft clear-caches/cp-resources, or delete the files within web/cpresources (besides .gitignore).

[23d1]

That did the trick, thanks Brandon!

[brandonkelly]

Sweet! Glad that worked.