Problem: The client is experiencing issues with 'Invalid post type' and 'Invalid taxonomy' errors after attempting to translate custom post types and taxonomies using the 'Post Types Unlimited' plugin, which is not listed in WPML's compatible plugin directory. Solution: 1. Navigate to WPML > Settings > Post Type Translation. 2. Set the translation preference for the post types 'ptu' and 'ptu_tax' to 'Not Translatable'. 3. Go to the 'Post Types Unlimited' plugin, delete any translations of custom post types and taxonomies. 4. Clear your site's caches and check if the post types are now accessible. If the issue persists, we recommend replicating the problem in our sandbox environment to isolate the issue. You can access the sandbox here: WPML Sandbox Environment.
If these steps do not resolve the issue or if it seems outdated or irrelevant to your case, please open a new support ticket. We also highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. For further assistance, you can contact us directly through the WPML support forum.
