PDF Stamper – Settings "Update Options" button gives 403 Forbidden error by Tips and Tricks HQ Support Portal › Forums › WP PDF Stamper › PDF Stamper – Settings "Update Options" button gives 403 Forbidden error Tagged: Error 403 This topic has 12 replies, 3 voices, and was last updated 8 years, 7 months ago by wzp. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In