Open /includes/init_includes/init_woz.php
Please edit a red part

Code:
  require_once(ABSPATH . 'wp-config.php');
  wp();

  if ($_GET['main_page'] == FILENAME_WORDPRESS && ( is_feed() || is_trackback() )) {
    gzip_compression();
    require_once(ABSPATH . WPINC . '/template-loader.php');
    exit();
  }

Open includes\classes\ssu\cores\link.php
Please add a red part

Code:
			// if the index.php is in the url, lets see if we need to rebuild the path and redirect.
			if((strpos($this->original_uri, 'index.php') !== false)){
				if(!isset($_GET['main_page']) || empty($_GET['main_page'])){
					$_GET['main_page'] = 'index';
					$this->original_uri = $this->original_uri. '&main_page=index';
				}
				if($this->checkPageExcludedList($_GET['main_page']))
					return false;
				$this->redirect_type = 2;
				return false;
			}

			// for WordPress On ZenCart BOF
			else if($_GET['main_page'] == FILENAME_WORDPRESS){ return false; }
			// for WordPress On ZenCart EOF

			// if we are using multi-lang, then we should have language code at the very beginning
			if(SSUConfig::registry('configs', 'multilang_status')){
				$languages_code = substr($this->original_uri, 0, 2);
				if(!array_key_exists($languages_code, SSUConfig::registry('languages')))
					$this->redirect_type = 1;
				else{
					$_get['language'] = $languages_code;
					$this->original_uri   = trim(substr($this->original_uri, 2), '/');
				}
			}

you’ll need to set the Ultimate SEO URL rewrite rules to ignore direct client requests for the /blog folder by using an additional RewriteCond.
eg)

Code:
# Donâ?™t rewrite blog directory
RewriteCond %{REQUEST_URI} !^/blog.* [NC]
RewriteCond %{REQUEST_URI} !^/wordpress.* [NC]

# Handle all other URIs using Zen Cart (index.php)
RewriteRule (.*) /index.php?%{QUERY_STRING} [L]

# Do rewrite blog directory
RewriteRule ^blog(.*)$ /index.php?main_page=wordpress&$1 [E=VAR1:$1,QSA,L]