Kindly help me to resolve this issue.
Error 404: Page not found ( Magento Admin Panel)
Which version of Magento is it?
Are you getting 404 only for a specific admin panel page or admin panel itself is not working? Also, let us know if you are trying to do any customization and share those details. It will help to understand more about your problem.
Please give Kudos if it helped and accept it as a solution.