Have you upgraded to Opencart 1.5
Versions: v188.8.131.52 v184.108.40.206 v220.127.116.11 v1.5.0
I had problems getting the SEO Friendly URLS to work on my Opencart 18.104.22.168 install, after looking in the HTACCESS file I found this:
The fix to make the SEO Friendly URLS – MOD REWRITE work change that line to:
Basically just remove the opencart/upload/ part!
There we go! Problem Solved!”
Alternatively if you’re unsure about editing files, simply upload the .htaccess file saved here, tested on the OpenCart versions 22.214.171.124 and below:
Are you looking to get your OpenCart Store ranked in google? contact: firstname.lastname@example.org and we will discuss your OpenCart SEO Needs!