Why does a 404 error appear in the detailed Bitrix?

Question

1C-Bitrix

Hello.
The situation is this. Site on 1C-Bitrix. Connected SSL certificate from Comodo. To get rid of duplicates and make an automatic redirect from www -> without www in htaccess, the following code was written:

<IfModule mod_rewrite.c>
  Options +FollowSymLinks
  RewriteEngine On

  RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
  RewriteRule ^(.*)$ https://%1/$1 [R=301,L]
  RewriteCond %{HTTP:SSL} !1
  RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [QSA,L,R=301]

  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-l
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !/bitrix/urlrewrite.php$
  RewriteRule ^(.*)$ /bitrix/urlrewrite.php [L]
  RewriteRule .* - [E=REMOTE_USER:%{HTTP:Authorization}]
</IfModule>

Until yesterday, the functionality worked perfectly, that is :
1. site.ru -> https://site.ru
2. www.site.ru -> https://site.ru
including news headings :
1. site.ru/news/tra-la-la -> https://site.ru/news/tra-la-la/
2. www.site.ru/news/tra-la-la -> https:// site.ru/news/tra-la-la/
Yesterday, when opening any news (detail page), there was first a 301 redirect: HTTP/1.1 301 Moved Permanently Location: https://site.ru/404.php , and then HTTP/ 1.1 404 Not Found
Nothing has changed on the site, other sites with exactly the same htaccess entries work as they should . I can not understand what is the reason for the appearance of a 404 error in the detailed one.
If you comment out these lines, then the detailed news is displayed:

RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
RewriteRule ^(.*)$ https://%1/$1 [R=301,L]
RewriteCond %{HTTP:SSL} !1
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [QSA,L,R=301]

but as expected, there is no SSL redirect nor www.
The reason for this behavior? How to overcome this mess?

Answer 1

Here is for Bitrix.
https://klondike-studio.ru/standards/standartnyy-h... Install
it if it doesn't work then there is an error in the code.
or server settings,
what OS is used, Bitrix vm?