CPT Plugin conflict . We are using this plugin in wordpress to create post types : https://wordpress.org/plugins/custom-post-type-ui/ And have 9 different post types. I want to achieve a particular permalink structure that works fine with custom url under post type settings. but when we open pages with the updated slug pages shows 404 error. Experience with WordPress rewrite rules, CPT UI, and debugging 404 errors is essential. I’d like this fixed ASAP, so please let me know how quickly you can jump in and sort it out.