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Please post your Diagnostic Info.

-IJ

Here you are thank you

site_url(): https://out-cube.com
home_url(): https://out-cube.com
Database Name: outcubec_wp400
Table Prefix: wpse_
WordPress: 5.8.3
Web Server: LiteSpeed
PHP: 7.4.27
MySQL: 5.5.5
ext/mysqli: yes
PHP Memory Limit: 768M
WP Memory Limit: 512M
Memory Usage: 48 MB
Blocked External HTTP Requests: None
WP Locale: bg_BG
Organize offloads by month/year: Enabled
WP_DEBUG: No
WP_DEBUG_LOG: No
WP_DEBUG_DISPLAY: Yes
SCRIPT_DEBUG: No
WP Max Upload Size: 128 MB
PHP Time Limit: 90
PHP Error Log: error_log
WP Cron: Enabled
fsockopen: Enabled
allow_url_fopen: Disabled
OpenSSL: OpenSSL 1.0.2k  26 Jan 2017
cURL: 7.29.0
Zlib Compression: Enabled
PHP GD: 2.3.3
Imagick: Enabled
Basic Auth: Disabled
Proxy: Disabled

Media Files: 79
Offloaded Media Files: 72
Not Offloaded Media Files: 7

Number of Image Sizes: 12

Names and Dimensions of Image Sizes: 
thumbnail (none)
medium (none)
large (none)
1536x1536 (1536x1536)
2048x2048 (2048x2048)
woocommerce_thumbnail (300x300)
woocommerce_single (600x0)
woocommerce_gallery_thumbnail (100x100)
shop_catalog (300x300)
shop_single (600x0)
shop_thumbnail (100x100)

WP_CONTENT_DIR: /home/outcubec/public_html/wp-content
WP_CONTENT_URL: https://out-cube.com/wp-content
UPLOADS: Not defined
WP_PLUGIN_DIR: /home/outcubec/public_html/wp-content/plugins
WP_PLUGIN_URL: https://out-cube.com/wp-content/plugins

AS3CF_PROVIDER: Not defined
AS3CF_BUCKET: Not defined
AS3CF_REGION: Not defined
AS3CF_SETTINGS: Defined
AS3CF_SETTINGS Keys: access-key-id, provider, secret-access-key

Local URL:
https://out?cube.com/wp?content/uploads/2022/01/photo.jpg
Offload URL:
https://s3.eu?central?1.amazonaws.com/cdn.out?cube.com/wp?content/uploads/2022/01/19132356/photo.jpg

OME Metadata Version: 8

Custom tables:
wpse_as3cf_items: Ok

Storage Provider: Amazon S3
Use Server Roles: Off
Key File Path: N/A
Access Keys Set: Yes
Access Key ID Define: Not defined
Secret Access Key Define: Not defined

Bucket: cdn.out-cube.com
Region: eu-central-1
Block All Public Access: Disabled

Copy Files to Bucket: On
Enable Path: On
Custom Path: wp-content/uploads/
Use Year/Month: On
Object Versioning: On

Delivery Provider: Amazon S3
Rewrite Media URLs: On

Force HTTPS: On

Remove Files From Server: Off

Active Theme Name: Hello Elementor Child
Active Theme Version: 1.0.1
Active Theme Folder: hello-elementor-child
Parent Theme Name: Hello Elementor
Parent Theme Version: 2.4.2
Parent Theme Folder: hello-elementor

Active Plugins:
Advanced Woo Search PRO (v2.44) by ILLID
All In One WP Security (v4.4.9) by Tips and Tricks HQ, Peter Petreski, Ruhul, Ivy
CSS Hero (v5.0.5) by The CSS Hero Team
Cloudflare (v4.7.0) by Cloudflare, Inc.
Cyr-To-Lat (v5.2.6) by Sergey Biryukov, Mikhail Kobzarev, Igor Gergel
EWWW Image Optimizer (v6.3.0) by Exactly WWW
Elementor (v3.5.3) by Elementor.com
Elementor Pro (v3.5.2) by Elementor.com
Enable Media Replace (v3.6.3) by ShortPixel
Essential Addons for Elementor (v5.0.2) by WPDeveloper
Facebook for WooCommerce (v2.6.9) by Facebook
Filter Everything PRO (v1.5.1) by Andrii Stepasiuk
Font Awesome (v4.0.4) by Font Awesome
Forminator (v1.15.9) by WPMU DEV
Frontend Reset Password (v1.2) by Square One Media
Health Check & Troubleshooting (v1.4.5) by The www.remarpro.com community
Loco Translate (v2.5.7) by Tim Whitlock
Media Cleaner (Pro) (v6.2.7) by Jordy Meow
OoohBoi Image Mask (v1.1.1) by OoohBoi
OoohBoi Steroids for Elementor (v1.8.2) by OoohBoi
Query Monitor (v3.8.2) by John Blackbourn
TI WooCommerce Wishlist (v1.30.1) by TemplateInvaders
UpdraftPlus - Backup/Restore (v1.22.1) by UpdraftPlus.Com, DavidAnderson
Use Memcached (v1.0.4) by Palasthotel  (in person: Edward Bock)
User Menus (v1.2.7) by Code Atlantic
Visibility Logic for Elementor (v2.2.1) by StaxWP
WCFM - WooCommerce Frontend Manager (v6.6.1) by WC Lovers
WCFM - WooCommerce Frontend Manager - Analytics (v2.2.3) by WC Lovers
WCFM - WooCommerce Frontend Manager - Groups & Staffs (v3.4.8) by WC Lovers
WCFM - WooCommerce Frontend Manager - Ultimate (v6.6.0) by WC Lovers
WCFM - WooCommerce Multivendor Marketplace (v3.5.2) by WC Lovers
WCFM - WooCommerce Multivendor Membership (v2.10.3) by WC Lovers
WP Armour - Honeypot Anti Spam (v1.9.1) by Dnesscarkey
WP Frontend Delete Account (v1.5.9) by Санджеев Ариал
WP Offload Media Lite (v2.5.5) by Delicious Brains
WP Rollback (v1.7.1) by Impress.org
WP Upload Restriction (v2.2.8) by Sajjad Hossain
WP-Optimize - Clean, Compress, Cache (v3.2.1) by David Anderson, Ruhani Rabin, Team Updraft
WooCommerce (v6.1.0) by Automattic
WooSwipe (v1.1.13) by Thrive Website Design
Yoast SEO (v17.9) by Team Yoast

Must-use Plugins:
Health Check Troubleshooting Mode (v1.7.2) by 
[Forminator] - Custom Form Redirect Based On Submitted Form Data (v1.0.1) by Panos Lyrakis @ WPMUDEV

Drop-ins:
advanced-cache.php - advanced-cache.php
object-cache.php - object-cache.php

• This reply was modified 2 years, 10 months ago by Yui. Reason: formatting

Both forms of the full domain seem to work fine…

ian@ians-tuxedo:~/Support $ dig cdn.out-cube.com.s3-eu-central-1.amazonaws.com
cdn.out-cube.com.s3-eu-central-1.amazonaws.com. 60 IN CNAME s3-r-w.eu-central-1.amazonaws.com.
s3-r-w.eu-central-1.amazonaws.com. 60 IN A      52.219.75.53
ian@ians-tuxedo:~/Support $ dig cdn.out-cube.com.s3.eu-central-1.amazonaws.com
cdn.out-cube.com.s3.eu-central-1.amazonaws.com. 60 IN CNAME s3-r-w.eu-central-1.amazonaws.com.
s3-r-w.eu-central-1.amazonaws.com. 60 IN A      52.219.170.98

Probably best that you chat with Cloudflare to see why you’re getting that error.

-IJ