error_log tail:
[Fri Jan 13 02:32:08.657489 2023] [core:alert] [pid 26735:tid 140567610607360] [client xx:xx:xx:xx:xxxx] /home/seihoen.heliohost.org/public_html/en/.htaccess: Options not allowed here, referer: https://www.seihoeng.com/
.htaccess:
# Disable Directory Listing
Options -Indexes
# Security Headers - X-XSS-Protection
<IfModule mod_headers.c>
Header set X-XSS-Protection "1; mode=block"
</IfModule>
# Security Headers - X-Frame-Options
<IfModule mod_headers.c>
Header always append X-Frame-Options SAMEORIGIN
</IfModule>
# Security Headers - X-Content-Type: nosniff
<IfModule mod_headers.c>
Header set X-Content-Type-Options nosniff
</IfModule>
# php -- BEGIN cPanel-generated handler, do not edit
# Set the “ea-php80” package as the default “PHP” programming language.
<IfModule mime_module>
AddHandler application/x-httpd-ea-php80 .php .php8 .phtml
</IfModule>
# php -- END cPanel-generated handler, do not edit
I commented out "Options -Indexes" and it works OK now!
Thank you @Krydos!