If you have posts that are now returning a 404 error page, don’t panic (yet) most of the time your posts are still there and you just need to update your permalink settings to fix the issue. This is very common with themes that use custom post types. Whenever you activate a new theme that uses custom post types you should reset your permalink settings.
To Fix: Go to Settings->Permalinks and click the save button. If this doesn’t work contact us at our support forum or email us at email@example.com
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