I can do coding very well but not much ideas with htaccess. One of my client's website is created by other company but there is some issue as below. https://www.amerrugs.com/about-amer This url is working fine. But when adding slash / at last of URL like https://www.amerrugs.com/about-amer/ then its giving internal error. While its working fine with product category means when we are opening category then its redirecting and adding slash (/) automatically https://www.amerrugs.com/power-loom/ This htaccess code is very new for me ...... So no ideas what i should add or change to fix this. htaccess code is as below Options +FollowSymlinks RewriteEngine on RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)? RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$ RewriteRule ^(.*)$ http://localhost/amerrugs/$1 [L,R=301] RewriteCond %{HTTPS} on RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)? RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$ RewriteRule ^(.*)$ http://localhost/amerrugs/$1 [L,R=301] ErrorDocument 404 /404.php RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)? RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$ RewriteRule ^(.*)index\.(php|html?)$ /$1 [R=301,NC,L] RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.php -f RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)? RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$ RewriteRule ^(.*)$ $1.php # Return 404 if original request is .php RewriteCond %{THE_REQUEST} "^[^ ]* .*?\.php[? ].*$" RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$ RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)? RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$ RewriteRule .* - [L,R=404] Code (markup): Need help of any htaccess expert to fix issue of this website. Thanks Suraj Anjaana