XAMPP bug, how to solve?

Question

htaccess

I don't understand what's the matter. Xampp does not open links where there is a Russian letter "x" followed by some other symbol.
.htaccess file content
AddDefaultCharset utf-8
AddCharset utf-8 *
CharsetSourceEnc utf-8
CharsetDefault utf-8
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^.*$ index.php [QSA, L]
Contents of index.php
<?php
echo 'Index file'; http :
//testhu.local/chi
Error The
requested URL was not found on this server


Some x..
XAMPP Version: 5.5.28