with bitrix enviroment installed like a base webserver, my drupal installation show some issues to create the styles.

After check permissions from filesystem and the configuration of apache they don't show error then check the nginx configuration the problem could be the next couple of lines

with bitrix enviroment
/etc/nginx/bx/conf/bitrix.conf

if you don't have bitrix and just have nginx the config file is in
/etc/nginx/nginx.conf

Your system configuration does not currently support this feature. The handbook page on Clean URLs has additional troubleshooting information.

In this section are instructions for troubleshooting specific problems with Clean URLs.

Certain patterns can be harmful or dangerous for your site.

Aliases that begin at the root

If you have an alias such as [title-raw] for a piece of content that users can create you allow them to create pages like "http://www.example.com/google1234567.html" that are used to authenticate Google or Yahoo! webmaster tools. This then allows the user to authenticate as the owner of the site and control the entries inside those tools (including removing your site from the index, changing between www and no-www versions of your site, telling the search bot to visit less frequently). This is not the default and is not recommended. If you want short aliases at a minimum make your pattern something like "c/[title-raw]" to put a character "c" before every title.

Index Aliases

For example, certain situations where you create a pattern like forum/[title] and you have "Create Index Aliases" turned on pathauto will then create a page at example.com/forum/ which over-rides the default example.com/forum page. In order to fix this problem you can clear out that entry from the url aliases either via the GUI at example.com/admin/path or via the database table. A better path to create would be forums/ or discussions/ so that the names don't collide.

Transliteration Problems

When I installed Drupal with clean url's it made my Awstats (within the cgi-bin) not work and just return a Drupal page not found error.

Drupal is installed in the root directory (public_html) of my web space so is the cgi-bin folder that Awstats is in.

I fixed the problem by changing the protect files and adding 1 rewriteCond line to the .htaccess file as follows:

In the FilesMatch section, find " |code-style\.pl " without the quotes and remove it from the following code:

The Pathauto module creates automatic path aliases for content, users, and taxonomy terms, eliminating the need to create them manually. This way, your site is more user and search engine friendly, and more descriptive about its content with less work from your side.

The Pathauto module automatically generates URL/path aliases for various kinds of content (nodes, taxonomy terms, users) without requiring the user to manually specify the path alias. This allows you to have URL aliases like /category/my-node-title  instead of /node/123 . The aliases are based upon a "pattern" system that uses tokens which the administrator can change.

The aliases are generated when you create content in your site and are based upon the pathauto patterns (placeholders) you specify at:

1. For 6.x :  Administer > Site Building > URL aliases , in the "Automated alias settings" tab.
2. For 7.x, 8.x :  Administer > Configuration > Search and Metadata > URL aliases , in the "Patterns" tab.