iFrame auf externer Seite einbinden | Blockiert durch X-Frame-Options-Richtlinie

### wp-core ###

version: 5.4
site_language: de_DE
user_language: de_DE
timezone: +01:00
permalink: /a/%postname%/%post_id%/
https_status: true
user_registration: 0
default_comment_status: open
multisite: false
user_count: 1
dotorg_communication: true

### wp-paths-sizes ###

wordpress_path: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu
wordpress_size: 48,44 MB (50792307 bytes)
uploads_path: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content/uploads
uploads_size: 20,29 MB (21273312 bytes)
themes_path: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content/themes
themes_size: 15,83 MB (16599649 bytes)
plugins_path: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content/plugins
plugins_size: 90,65 MB (95057909 bytes)
database_size: 4,27 MB (4472832 bytes)
total_size: 179,48 MB (188196009 bytes)

### wp-dropins (1) ###

maintenance.php: true

### wp-active-theme ###

name: Bootstrap Four (bootstrap-four)
version: 0.2.3
author: Taylor Young
author_website: http://hyprtxt.com/
parent_theme: none
theme_features: post-thumbnails, custom-background, automatic-feed-links, title-tag, html5, menus, editor-style, widgets
theme_path: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content/themes/bootstrap-four

### wp-themes-inactive (7) ###

Boutique: version: 2.0.17, author: WooCommerce
Sparkling: version: 2.4.7, author: Colorlib
Storefront: version: 2.5.5, author: Automattic
Twenty Nineteen: version: 1.4, author: WordPress-Team (latest version: 1.5)
Twenty Seventeen: version: 2.2, author: WordPress-Team (latest version: 2.3)
Twenty Sixteen: version: 2.0, author: WordPress-Team (latest version: 2.1)
Twenty Twenty: version: 1.0, author: WordPress-Team (latest version: 1.2)

### wp-plugins-active (8) ###

Advanced Order Export For WooCommerce: version: 3.1.4, author: AlgolPlus
Checkout Field Editor for WooCommerce: version: 1.4.2, author: ThemeHigh
Jetpack by WordPress.com: version: 8.4.2, author: Automattic
Ninja Forms: version: 3.3.21.2, author: The WP Ninjas (latest version: 3.4.24.1)
PPOM for WooCommerce by N-MEDIA: version: 20.1, author: Najeeb Ahmad
WooCommerce: version: 4.0.1, author: Automattic
WooCommerce Services: version: 1.23.0, author: Automattic
Wp-testing: version: 0.21.18, author: Alexander Ustimenko

### wp-plugins-inactive (3) ###

Akismet Anti-Spam: version: 4.1.3, author: Automattic (latest version: 4.1.4)
Colorlib Login Customizer: version: 1.2.94, author: Colorlib (latest version: 1.2.95)
WooCommerce Customizer: version: 2.7.3, author: SkyVerge

### wp-media ###

image_editor: WP_Image_Editor_GD
imagick_module_version: Nicht verfügbar
imagemagick_version: Nicht verfügbar
gd_version: 2.1.1
ghostscript_version: 9.26

### wp-server ###

server_architecture: Linux 4.4.0-042stab140.1 x86_64
httpd_software: Apache
php_version: 7.0.33-0ubuntu0.16.04.12 64bit
php_sapi: fpm-fcgi
max_input_variables: 1000
time_limit: 30
memory_limit: 256M
max_input_time: 60
upload_max_size: 16M
php_post_max_size: 8M
curl_version: 7.47.0 OpenSSL/1.0.2g
suhosin: false
imagick_availability: false
htaccess_extra_rules: true

### wp-database ###

extension: mysqli
server_version: 5.7.29-0ubuntu0.16.04.1
client_version: mysqlnd 5.0.12-dev - 20150407 - $Id: b5c5906d452ec590732a93b051f3827e02749b83 $

### wp-constants ###

WP_HOME: undefined
WP_SITEURL: undefined
WP_CONTENT_DIR: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content
WP_PLUGIN_DIR: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content/plugins
WP_MAX_MEMORY_LIMIT: 256M
WP_DEBUG: false
WP_DEBUG_DISPLAY: true
WP_DEBUG_LOG: false
SCRIPT_DEBUG: false
WP_CACHE: false
CONCATENATE_SCRIPTS: undefined
COMPRESS_SCRIPTS: undefined
COMPRESS_CSS: undefined
WP_LOCAL_DEV: undefined
DB_CHARSET: utf8
DB_COLLATE: undefined

### wp-filesystem ###

wordpress: writable
wp-content: writable
uploads: writable
plugins: writable
themes: writable

### jetpack ###

site_id: 176158941
ssl_cert: No
time_diff: undefined
version_option: 8.4.2:1587416945
old_version: 8.4.2:1587416945
public: Public
master_user: #1 paulploeger (paulploger@gmail.com)
current_user: #1 paulploeger (paulploger@gmail.com)
tokens_set: Blog User
blog_token: y!yx0Dggp6fyau6gMqvH4!tBM^NFh1OV
user_token: @hV$hy@Ea#6$)aCiU6VJEV1$o@ksJI5c
version: 8.4.2
jp_plugin_dir: /var/www/vhosts/pi.wh.hostnation.de/paul.ploegers.eu/wp-content/plugins/jetpack/
plan: free
HTTP_HOST: paul.ploegers.eu
SERVER_PORT: 443
HTTPS: on
HTTP_X_REAL_IP: 89.15.239.242
REMOTE_ADDR: 89.15.239.242
protect_header: {"trusted_header":"REMOTE_ADDR","segments":1,"reverse":false}
full_sync: {"started":"Mon, 20 Apr 2020 21:11:54 +0000","finished":"Mon, 20 Apr 2020 21:12:16 +0000","progress":{"options":{"finished":true},"functions":{"finished":true},"constants":{"finished":true},"users":{"total":"1","sent":1,"finished":true,"last_sent":"1"}},"config":{"options":true,"functions":true,"constants":true,"users":[1]}}
sync_size: undefined
sync_lag: 0 seconds
full_sync_size: undefined
full_sync_lag: 0 seconds
idc_urls: {"home":"https:\/\/paul.ploegers.eu","siteurl":"https:\/\/paul.ploegers.eu","WP_HOME":"","WP_SITEURL":""}
idc_error_option: false
idc_optin: true
cxn_tests: All Pass.

Vielen Dank für deine Tipps,
ich habe von meinem Hoster erfahren wie ich die Einstellung für X-Frames verändern kann.
Diese waren auf „ALLOW“. Wenn ich sie auf „DENY“ stelle, dann wird der IFrame gar nicht mehr angezeigt, so wie es sein soll.
Allerdings ist dadurch mein Problem nicht gelöst. Ich habe die Richtlinie wieder auf Allow gestellt. Leider ist es immer noch so, dass ich alles in den Warenkorb packen kann, aber sobald ich zur Kasse gehe wird diese Blockiert mit dem Bezug auf die X-Frame-Options-Richtlinie.