The Core Plugin Functionality plugin manages the theme’s custom post types.
After installing and activating it, you may encounter 404 – Not Found errors on Properties pages, Archives, or Category pages.
The same can happen when you change the Permalinks Names from Theme Options.
If you see a Page Not Found error for Properties or Categories, you need to flush and save your permalink settings to apply the new plugin’s rewrite rules correctly. This is a one-time step after plugin activation.
How to fix it:
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Go to Admin Dashboard > Appearance > Permalinks
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Select the Custom Structure option (or keep your current permalink structure)
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Click Save Changes
This action refreshes the permalink rules and should resolve the 404 errors.