SEO Friendly url issue

Hello,
i need some help regarding seo friendly url for seo purpose for my website http://aleap.in

i have uploaded .htaccess for and enable seo friendly url option and even getting changes also but
on that same page i am getting Error note as below

Notice: Undefined index: path in /home/aleap1234/public_html/catalog/view/theme/carera/template/product/category.tpl on line 27


my code is:

RewriteEngine On
RewriteRule ^sitemap.xml$ index.php?route=feed/google_sitemap [L]
RewriteRule ^googlebase.xml$ index.php?route=feed/google_base [L]
RewriteRule ^download/(.*) /index.php?route=error/not_found [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]


please let me know what should i do for this error how to solve please revert as soon as possible.

please see attached screenshot of error displayed

Step 1: Log into your OpenCart Admin panel.

Step 2: Go to System>>Settings and click on the Server tab.

Step 3: Here on this interface you will find “Use SEO URLs” option.
Here I have created a new page and it is SEO friendly. For your reference, you can check it out.

You should also focus on human-friendly URL rather than SEO friendly! Try to focus on high-quality and unique content for the best SEO.

SEO Urls are the least of your problems. Your website is so slow, it's virtually unreachable. Get a proper webhost!

And if you really want some help here, you have to provide some more details: OC version used, installed extensions, web theme etc.