Reply To: Tribulant Shopping Cart – 403 error

Create a skip/bypass RewriteRule for the tribulant /shop folder.  See the instructions in the link below.

http://forum.ait-pro.com/forums/topic/custom-applications-outside-of-wordpress-3rd-party-apps/#post-13664

# WP REWRITE LOOP START
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# RewriteRule for the tribulant /shop folder
RewriteRule ^shop/ - [L]