Warning in Duplicator

Hallo zusammen,

ich weiß ja, dass es hier einige Spezialisten in Sachen Duplicator gibt. Folgendes Problem:
Wenn ich ein Archiv anlegen will, das steht bei den Pfaden ein Warning:

Wenn das Hauptverzeichnis von WordPress nicht durch PHP beschreibbar ist, kann dies zu Problemen führen.

Das ist mir ein Rätsel, denn so wie es aussieht, kann PHP in dem Verzeichnis schreiben. Mit diesem simplen Script

<?php
   file_put_contents("xx.txt", "Hallo Welt");
   echo "Ready";
   ?>

Wird die Datei xx.txt auch angelegt. Also scheint PHP ja in dem Verzeichnis schreiben können.
Das erstellte Archiv ist auch gerade mal 2,6MB groß, dass ist deutlich zu kein. Mache ich was falsch oder wo könnte das Problem liegen?

### wp-core ###

version: 5.5.3
site_language: de_DE
user_language: de_DE
permalink: /%postname%/
https_status: false
user_registration: 0
default_comment_status: closed
multisite: false
user_count: 3
dotorg_communication: true

### wp-paths-sizes ###

wordpress_path: C:\INTERNET\xxxxxx
wordpress_size: 0,00 B (0 bytes)
uploads_path: C:\INTERNET\xxxxxx/wp-content/uploads
uploads_size: 30,83 MB (32325402 bytes)
themes_path: C:\INTERNET\xxxxxx/wp-content/themes
themes_size: 7,89 MB (8275257 bytes)
plugins_path: C:\INTERNET\xxxxxx/wp-content/plugins
plugins_size: 56,10 MB (58820136 bytes)
database_size: 11,24 MB (11783537 bytes)
total_size: 106,05 MB (111204332 bytes)

### wp-active-theme ###

name: xxxxxx GmbH (xxxxxx)
version: 1.0
author: xxxxxx GmbH
author_website: https://www.xxxxxx.de
parent_theme: Ample (ample)
theme_features: core-block-patterns, automatic-feed-links, title-tag, align-wide, post-thumbnails, woocommerce, wc-product-gallery-zoom, wc-product-gallery-lightbox, wc-product-gallery-slider, menus, html5, custom-background, custom-logo, customize-selective-refresh-widgets, custom-header, widgets, editor-style
theme_path: C:\INTERNET\xxxxxx/wp-content/themes/xxxxxx

### wp-parent-theme ###

name: Ample (ample)
version: 9.0.0
author: ThemeGrill
author_website: https://themegrill.com
theme_path: C:\INTERNET\xxxxxx/wp-content/themes/ample

### wp-themes-inactive (2) ###

Twenty Nineteen: version: 1.7, author: WordPress-Team
Twenty Twenty: version: 1.5, author: WordPress-Team

### wp-mu-plugins (1) ###

WP Migrate DB Compatibility: version: 1.2, author: Delicious Brains

### wp-plugins-active (16) ###

Advanced Editor Tools (previously TinyMCE Advanced): version: 5.5.1, author: Automattic
Advanced WP Columns: version: 2.0.6, author: Vladica Savic
AH Display Widgets: version: 1.0.3, author: Andreas Hecht
Classic Editor: version: 1.6, author: WordPress Contributors
Contact Form 7: version: 5.3, author: Takayuki Miyoshi
Duplicator: version: 1.3.38, author: Snap Creek
FileBird Lite: version: 4.1, author: Ninja Team
Google XML Sitemaps: version: 4.1.1, author: Auctollo
Health Check & Troubleshooting: version: 1.4.5, author: The WordPress.org community
Max Mega Menu: version: 2.9.1, author: megamenu.com
Popup Builder: version: 3.69.5, author: Sygnoos
Smart Slider 3: version: 3.4.1.11, author: Nextend
WPGlobus: version: 2.5.16, author: WPGlobus
WP Migrate DB: version: 1.0.16, author: Delicious Brains
WP Statistics: version: 12.6.13, author: VeronaLabs
Yoast SEO: version: 15.2.1, author: Team Yoast

### wp-media ###

image_editor: WP_Image_Editor_GD
imagick_module_version: Nicht verfügbar
imagemagick_version: Nicht verfügbar
gd_version: bundled (2.1.0 compatible)
ghostscript_version: not available

### wp-server ###

server_architecture: Windows NT 6.3 i586
httpd_software: Microsoft-IIS/8.5
php_version: 7.2.22
php_sapi: cgi-fcgi
max_input_variables: 2500
time_limit: 300
memory_limit: 512M
max_input_time: 60
upload_max_size: 20M
php_post_max_size: 10M
curl_version: 7.64.0 OpenSSL/1.1.1c
suhosin: false
imagick_availability: false
server-headers: 
	cache-control: no-cache, must-revalidate, max-age=0
	content-type: text/html; charset=UTF-8
	content-encoding: gzip
	expires: Wed, 11 Jan 1984 05:00:00 GMT
	vary: Accept-Encoding
	server: Web5
	link: Array
	x-powered-by: ASP.NET
	date: Thu, 05 Nov 2020 18:51:58 GMT
	content-length: 21945

### wp-database ###

extension: mysqli
server_version: 5.5.37-MariaDB
client_version: mysqlnd 5.0.12-dev - 20150407 - $Id: 3591daad22de08524295e1bd073aceeff11e6579 $

### wp-constants ###

WP_HOME: undefined
WP_SITEURL: undefined
WP_CONTENT_DIR: C:\INTERNET\xxxxxx/wp-content
WP_PLUGIN_DIR: C:\INTERNET\xxxxxx/wp-content/plugins
WP_MAX_MEMORY_LIMIT: 512M
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

### wp-filesystem ###

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