Post Carousel Widget Styling Broken After Recent Update (Persists After Rollback)

### Description

I am writing to report a critical issue I encountered immediately after updating to the latest versions of Elementor and Elementor Pro. The styling for the Post Carousel widget, which is used extensively throughout my website, is completely broken.

Despite attempting to troubleshoot the issue by rolling back to a previous version and clearing various caches, the styling remains broken. This is affecting the live site, so any urgent assistance or insight would be greatly appreciated.

Actions Taken To Troubleshoot: I have already attempted the following steps without success:

1. Rollback: Rolled back both Elementor and Elementor Pro to version 3.35.5 and then 3.35.0.
2. Library Sync: Attempted to "Sync Library" within Elementor tools.
3. CSS Regeneration: Used the "Regenerate Files & Data" tool in Elementor settings.
4. Caching: Cleared all server-side caches and specifically cleared WP Rocket cache.
5. I temporarily added custom css to hold the styling while the styling which should come with the editor itself is not applying so until it is fixed i have added custom css so the traffic wont be effected.

Current Status: Even after performing the steps above (including the rollback and CSS regeneration), the widget styling is still not rendering correctly.

Could you please advise on a fix or investigate if there is a conflict introduced in the recent update that persists in the database or CSS files?

Thank you.

### Steps to reproduce

This issue is in this website it came after updaing the elementor and elementor plugins,
The site where the issue is (https://sirixmonitoring.com/) and you can see the brokken widget at the bottom of this page (https://sirixmonitoring.com/newsroom/)

### Expected behavior

Post carousel Widget styling is gone

### Elementor System Info

```txt
== Server Environment ==
Operating System: Linux
Software: Apache
MySQL version: MySQL Community Server - GPL v8.0.45
PHP Version: 8.2.29
PHP Memory Limit: 1024M
PHP Max Input Vars: 10000
PHP Max Post Size: 1024M
GD Installed: Yes
ZIP Installed: Yes
Write Permissions: All right
Elementor Library: Connected

== WordPress Environment ==
Version: 6.9.1
Site URL: https://sirixmonitoring.com
Home URL: https://sirixmonitoring.com
WP Multisite: No
Max Upload Size: 1 GB
Memory limit: 512M
Max Memory limit: 1024M
Permalink Structure: /blog/%postname%/
Language: en_CA
Timezone: -5
Admin Email: info@sirixmonitoring.com
Debug Mode: Inactive

== Theme ==
Name: Hello Elementor Child
Version:
Author: Hassan
Child Theme: Yes
Parent Theme Name: Hello Elementor
Parent Theme Version: 3.4.6
Parent Theme Author: Elementor Team

== User ==
Role: administrator
WP Profile lang: en-CA
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

== Active Plugins ==
Advanced Custom Fields
Version: 6.7.1
Author: WP Engine

All-in-One WP Migration and Backup
Version: 7.102
Author: ServMask

CookieYes | GDPR Cookie Consent
Version: 3.4.0
Author: CookieYes

Duplicate Page
Version: 4.5.6
Author: mndpsingh287

Elementor
Version: 3.35.5
Author: Elementor.com

Elementor Link Nofollow Checkbox
Version: 1.0.0
Author: Hussan

Elementor Pro
Version: 3.35.0
Author: Elementor.com

Email Notifier
Version: 1.0
Author: Your Name

Instant Indexing
Version: 1.1.22
Author: Rank Math

ManageWP - Worker
Version: 4.9.30
Author: GoDaddy

One User Avatar
Version: 2.5.4
Author: One Designs

Presto Player
Version: 4.1.0
Author: Presto Made, Inc

Safe SVG
Version: 2.4.0
Author: 10up

Schema & Structured Data for WP & AMP
Version: 1.56
Author: Magazine3

Simple History
Version: 5.23.1
Author: Pär Thernström

Sucuri Security - Auditing, Malware Scanner and Hardening
Version: 2.7
Author: Sucuri Inc.

TranslatePress - Business
Version: 1.7.4
Author: Cozmoslabs, Razvan Mocanu, Madalin Ungureanu

TranslatePress - Multilingual
Version: 3.1
Author: Cozmoslabs, Razvan Mocanu, Madalin Ungureanu, Cristophor Hurduban

WPCode Lite
Version: 2.3.4
Author: WPCode

WP Mail SMTP Pro
Version: 4.7.1
Author: WP Mail SMTP

WP Plugin Manager
Version: 1.4.11
Author: HasThemes

WP Rocket
Version: 3.18.2
Author: WP Media

WPS Hide Login
Version: 1.9.18
Author: WPServeur, NicolasKulka, wpformation

Yoast SEO
Version: 27.1.1
Author: Team Yoast

Yoast SEO: Local
Version: 15.7
Author: Team Yoast and Arjan Snaterse

Yoast SEO Premium
Version: 27.1
Author: Team Yoast

== Must-Use Plugins ==
htpm-mu-plugin.php
Version: 1.0.9
Author:

ManageWP - Worker Loader
Version: 1.0.0
Author: GoDaddy

WP Umbrella
Version: 1.0.0
Author: WP Umbrella

== Elements Usage ==

container : 39
button : 7
container : 126
divider : 1
heading : 68
html : 7
icon-box : 1
icon-list : 1
image : 47
shortcode : 1
spacer : 2
text-editor : 52
page : 13
button : 37
container : 265
heading : 104
hotspot : 1
html : 8
icon : 8
icon-box : 21
icon-list : 8
image : 52
image-box : 3
nested-carousel : 4
nested-tabs : 1
text-editor : 87
wp-page : 184
button : 319
container : 2327
divider : 11
heading : 990
hotspot : 1
html : 75
icon : 37
icon-box : 42
icon-list : 38
image : 418
image-box : 557
loop-carousel : 1
nested-accordion : 9
nested-carousel : 5
nested-tabs : 2
presto_video : 42
shortcode : 1
spacer : 91
text-editor : 1067
video : 3
loop-item : 10
button : 1
container : 2
theme-post-excerpt : 1
theme-post-featured-image : 1
theme-post-title : 1

== Settings ==

cpt_support: post, page
disable_color_schemes: yes
disable_typography_schemes: yes
allow_tracking: yes
unfiltered_files_upload: 1

== Features ==
Custom Fonts: 5
Custom Icons: 0

== Integrations ==

recaptcha: Active
recaptcha_v3: Active

== Elementor Experiments ==
Inline Font Icons: Inactive
Additional Custom Breakpoints: Active
Container: Active
Optimized Markup: Inactive by default
Default to New Theme Builder: Active
Header & Footer: Inactive
Pro Free Trial Popup: Inactive by default
Nested Elements: Active
Pages Panel: Inactive by default
Elementor Home Screen: Active by default
Atomic Widgets: Inactive by default
Global Classes: Inactive by default
Enforce global classes capabilities: Active by default
Variables: Active by default
Cloud Library: Active by default
Editor v4 (Opt In Page): Active by default
Editor V4: Inactive by default
Components: Active by default
Interactions: Active by default
Editor one: Active by default
Import/Export Customization: Active by default
Elementor Editor Events: Inactive by default
Atomic Form: Inactive by default
Menu: Active
Size Variables: Active by default
Pro Interactions: Inactive by default
In-Editor Feedback: Inactive by default

== Log ==

JS: showing 15 of 15JS: 2026-02-16 10:43:09 [error X 8][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/admin.min.js?ver=3.35.4:2:45739] r.startsWith is not a function
JS: 2026-02-17 06:53:07 [error X 4][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/frontend-modules.min.js?ver=3.35.4:1:31191] Cannot read properties of undefined (reading 'attributes')
JS: 2026-02-17 11:01:02 [error X 2][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/packages/editor-v1-adapters/editor-v1-adapters.min.js?ver=3.35.4:1:5030] Cannot read properties of undefined (reading 'createError')
JS: 2026-02-17 11:01:02 [error X 2][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/packages/editor-documents/editor-documents.min.js?ver=3.35.4:1:3951] Cannot read properties of undefined (reading '__privateListenTo')
JS: 2026-02-17 11:01:02 [error X 1][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/packages/menus/menus.min.js?ver=3.35.4:1:1204] Cannot read properties of undefined (reading 'capitalize')
JS: 2026-02-17 11:01:02 [error X 1][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/checklist.min.js?ver=3.35.4:2:46012] Cannot read properties of undefined (reading 'registerLink')
JS: 2026-02-17 11:10:29 [error X 2][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/import-export-customization-admin.min.js?ver=3.35.4:2:32940] elementorAdmin is not defined
JS: 2026-02-18 12:18:35 [error X 4][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c33widgetsticky'
JS: 2026-02-19 07:49:01 [error X 6][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c39widgetsticky'
JS: 2026-02-19 07:49:02 [error X 6][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c235widgetsticky'
JS: 2026-02-19 07:49:02 [error X 6][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c247widgetsticky'
JS: 2026-02-23 11:13:07 [error X 6][https://sirixmonitoring.com/wp-content/plugins/elementor/assets/js/editor.min.js?ver=3.35.5:2:934117] Failed to execute 'querySelector' on 'Document': '#' is not a valid selector.
JS: 2026-02-24 09:11:28 [error X 1][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c163widgetsticky'
JS: 2026-02-24 09:11:28 [error X 1][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c350widgetsticky'
JS: 2026-03-02 12:18:48 [error X 3][https://sirixmonitoring.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1:2:37833] Cannot create property 'guid' on string 'c677widgetsticky'

PHP: showing 7 of 7PHP: 2026-02-17 05:40:07 [warning X 110][/home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/core/app/modules/site-editor/data/endpoints/templates.php::150] Undefined array key "condition_type" [array (
'trace' => '
#0: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/core/app/modules/site-editor/data/endpoints/templates.php(150): Elementor\Core\Logger\Manager -> rest_error_handler()
#1: ElementorPro\Core\App\Modules\SiteEditor\Data\Endpoints\Templates -> normalize_template_json_item()
#2: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/core/app/modules/site-editor/data/endpoints/templates.php(120): class type array_map()
#3: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/core/app/modules/site-editor/data/endpoints/templates.php(59): ElementorPro\Core\App\Modules\SiteEditor\Data\Endpoints\Templates -> normalize_templates_json()
#4: /home/sirixmonitoring/public_html/wp-content/plugins/elementor/data/base/endpoint.php(156): ElementorPro\Core\App\Modules\SiteEditor\Data\Endpoints\Templates -> get_items()
',
)]
PHP: 2026-02-17 06:30:20 [error X 5][/home/sirixmonitoring/public_html/wp-content/plugins/elementor/modules/cloud-library/module.php::207] Uncaught WpOrg\Requests\Exception\Http\Status403: 403 Forbidden in /home/sirixmonitoring/public_html/wp-content/plugins/elementor/modules/cloud-library/module.php:207
Stack trace:
#0 /home/sirixmonitoring/public_html/wp-content/plugins/elementor/modules/cloud-library/module.php(57): Elementor\Modules\CloudLibrary\Module->is_screenshot_proxy_mode(Array)
#1 /home/sirixmonitoring/public_html/wp-content/plugins/elementor/core/base/module.php(86): Elementor\Modules\CloudLibrary\Module->__construct()
#2 /home/sirixmonitoring/public_html/wp-content/plugins/elementor/core/modules-manager.php(64): Elementor\Core\Base\Module::instance()
#3 /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/plugin.php(703): Elementor\Core\Modules_Manager->__construct()
#4 /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/plugin.php(621): Elementor\Plugin->init_components()
#5 /home/sirixmonitoring/public_html/wp-includes/class-wp-hook.php(341): Elementor\Plugin->init('')
#6 /home/sirixmonitoring/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)
#7 /home/sirixmonitoring/public_html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#8 /home/sirixmonitoring/public_html/wp-settings.php(742): do_action('init')
#9 /home/sirixmonitoring/public_html/wp-config.php(99): require_once('/home/sirixmoni...')
#10 /home/sirixmonitoring/public_html/wp-load.php(50): require_once('/home/sirixmoni...')
#11 /home/sirixmonitoring/public_html/wp-blog-header.php(13): require_once('/home/sirixmoni...')
#12 /home/sirixmonitoring/public_html/index.php(17): require('/home/sirixmoni...')
#13 {main}
thrown [array (
'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2026-02-18 06:47:02 [warning X 5][/home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/managers/image.php::113] Trying to access array offset on value of type bool [array (
'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2026-02-20 02:41:30 [notice X 187][/home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php::230] hexdec(): Passing null to parameter #1 ($hex_string) of type string is deprecated [array (
'trace' => '
#0: Elementor\Core\Logger\Manager -> rest_error_handler()
#1: /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(230): class type hexdec()
#2: /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(244): Elementor\Controls_Stack -> get_id_int()
#3: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/modules/mega-menu/widgets/mega-menu.php(2029): Elementor\Controls_Stack -> get_widget_number()
#4: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/modules/mega-menu/widgets/mega-menu.php(2406): ElementorPro\Modules\MegaMenu\Widgets\Mega_Menu -> render_menu_wrapper_attributes()
',
)]
PHP: 2026-02-20 02:41:30 [notice X 187][/home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php::230] hexdec(): Passing null to parameter #1 ($hex_string) of type string is deprecated [array (
'trace' => '
#0: Elementor\Core\Logger\Manager -> rest_error_handler()
#1: /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(230): class type hexdec()
#2: /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(244): Elementor\Controls_Stack -> get_id_int()
#3: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/modules/mega-menu/widgets/mega-menu.php(2030): Elementor\Controls_Stack -> get_widget_number()
#4: /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/modules/mega-menu/widgets/mega-menu.php(2406): ElementorPro\Modules\MegaMenu\Widgets\Mega_Menu -> render_menu_wrapper_attributes()
',
)]
PHP: 2026-02-27 05:39:22 [notice X 1][/home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/template-library/sources/base.php::537] ob_end_clean(): Failed to delete buffer. No buffer to delete [array (
'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2026-03-09 03:15:31 [error X 1][/home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/plugin.php::350] Uncaught Error: Class "ElementorPro\Core\Modules_Manager" not found in /home/sirixmonitoring/public_html/wp-content/plugins/elementor-pro/plugin.php:350
Stack trace:
#0 /home/sirixmonitoring/public_html/wp-includes/class-wp-hook.php(341): ElementorPro\Plugin->on_elementor_init('')
#1 /home/sirixmonitoring/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters('', Array)
#2 /home/sirixmonitoring/public_html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#3 /home/sirixmonitoring/public_html/wp-content/plugins/elementor/includes/plugin.php(632): do_action('elementor/init')
#4 /home/sirixmonitoring/public_html/wp-includes/class-wp-hook.php(341): Elementor\Plugin->init('')
#5 /home/sirixmonitoring/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)
#6 /home/sirixmonitoring/public_html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#7 /home/sirixmonitoring/public_html/wp-settings.php(742): do_action('init')
#8 /home/sirixmonitoring/public_html/wp-config.php(99): require_once('/home/sirixmoni...')
#9 /home/sirixmonitoring/public_html/wp-load.php(50): require_once('/home/sirixmoni...')
#10 /home/sirixmonitoring/public_html/wp-blog-header.php(13): require_once('/home/sirixmoni...')
#11 /home/sirixmonitoring/public_html/index.php(17): require('/home/sirixmoni...')
#12 {main}
thrown [array (
'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]

Log: showing 20 of 212026-02-20 02:05:26 [info] Elementor/Upgrades - _on_each_version Start
2026-02-20 02:05:28 [info] Elementor/Upgrades - _on_each_version Finished
2026-02-20 02:05:28 [info] Elementor/Upgrades - _on_each_version Start
2026-02-20 02:05:29 [info] Elementor/Upgrades - _on_each_version Finished
2026-02-20 02:05:29 [info] Elementor/Upgrades - _on_each_version Start
2026-02-20 02:05:30 [info] Elementor/Upgrades - _on_each_version Finished
2026-02-20 02:05:30 [info] Elementor data updater process has been completed. [array (
'plugin' => 'Elementor',
'from' => '3.35.4',
'to' => '3.35.5',
)]
2026-02-20 02:05:35 [info] Elementor data updater process has been queued. [array (
'plugin' => 'Elementor',
'from' => '3.35.4',
'to' => '3.35.5',
)]
2026-02-20 02:05:36 [info] Elementor data updater process has been queued. [array (
'plugin' => 'Elementor',
'from' => '3.35.4',
'to' => '3.35.5',
)]
2026-02-20 02:07:18 [info] elementor-pro::elementor_pro_updater Started
2026-02-20 02:07:18 [info] Elementor Pro/Upgrades - _on_each_version Start
2026-02-20 02:07:18 [info] Elementor Pro/Upgrades - _on_each_version Finished
2026-02-20 02:07:18 [info] Elementor data updater process has been completed. [array (
'plugin' => 'Elementor Pro',
'from' => '3.35.0',
'to' => '3.35.1',
)]
2026-02-20 02:07:24 [info] Elementor data updater process has been queued. [array (
'plugin' => 'Elementor Pro',
'from' => '3.35.0',
'to' => '3.35.1',
)]
2026-03-06 02:32:58 [info] elementor::elementor_updater Started
2026-03-06 02:32:58 [info] Elementor/Upgrades - _on_each_version Start
2026-03-06 02:32:59 [info] Elementor/Upgrades - _on_each_version Finished
2026-03-06 02:32:59 [info] Elementor/Upgrades - _on_each_version Start
2026-03-06 02:33:01 [info] Elementor/Upgrades - _on_each_version Finished
2026-03-06 02:33:01 [info] Elementor data updater process has been completed. [array (
'plugin' => 'Elementor',
'from' => '3.35.5',
'to' => '3.35.6',
)]

== Elementor - Compatibility Tag ==

Elementor Link Nofollow Checkbox: Compatibility not specified
Elementor Pro: Compatibility not specified

== Elementor Pro - Compatibility Tag ==
```

### Agreement

- [x] I confirm I have read and followed all the guidelines and instructions outlined in the Elementor Bug Report form.
- [x] I agree that my issue may be closed without further action if it doesn't meet all the requirements outlined in the Elementor Bug Report form.