Holy smoke. Are you using wp rocket in your site? If so, please turn it off momentarily and replace your htaccess code with just the following:
# BEGIN WordPress
# The directives (lines) between "BEGIN WordPress" and "END WordPress" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# BEGIN WP Cloudflare Super Page Cache
# The directives (lines) between "BEGIN WP Cloudflare Super Page Cache" and "END WP Cloudflare Super Page Cache" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_expires.c>
ExpiresActive on
ExpiresByType application/xml "access plus 0 seconds"
ExpiresByType text/xsl "access plus 0 seconds"
</IfModule>
<FilesMatch "\.(xml|xsl)$">
<IfModule mod_headers.c>
Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
</IfModule>
</FilesMatch>
<FilesMatch "robots\.txt">
<IfModule mod_headers.c>
Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
</IfModule>
</FilesMatch>
<IfModule mod_rewrite.c>
RewriteCond %{REQUEST_URI} ^(.*)?/wp-content/wp-cloudflare-super-page-cache/atelierb.ae/debug.log(.*)$
RewriteRule ^(.*)$ - [F]
</IfModule>
<FilesMatch "wp-cron.php">
<IfModule mod_headers.c>
Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
</IfModule>
</FilesMatch>
# END WP Cloudflare Super Page Cache
After that inside the plugin settings, purge your Cloudflare cache and let me know so that I can text.