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Fix Error 404 on custom post types

You may face problems with 404 errors or not found pages and Custom Post Types. Try the following steps:

  1. Make sure that none of your Custom Post Types and Single pages have the same name. If they do, rename the single page, including the Slug.
  2. Log into your WordPress Administration Screens, navigate to Settings > Permalinks. Select the default permalinks and Save. Then re-select your preferred permalinks. This will Flush the rewrite rules and should solve your problem.