Http Error 500 After Update To 4.15.1.sp1

[ecomlabs]

In this case try the following solution

Seo Url Rewrite, Can't Get It To Work!

app/addons/seo/schemas/settings/actions.functions.post.php Try to comment our the following code and check if SEO works correctly if (strpos($headers, '200 OK') === false) { $new_value = 'D'; fn_set_notification('W', __('warning'), __('warning_seo_urls_disabled')); }