I am unable to access my manage categories option in my Magento admin panel. When I click on the manage categories,it shows that the page does not exist.
It redirects to my old website URL of 404 not found page.
I copied the new adminhtml of Magento in it, but still, this error is showing up. When I open a product, here when I open manage products, then go to edit of product, after the product page is opened. On the product page, There is a categories option tab, here all categories are displaying.
I searched on google but didn't get any specific answer to this problem. Should I have to make any change in the database to view the manage categories page properly?