404 Page not Displaying

If it is not going to your 404.php , then is it redirecting to index.php.

a. If it is redirecting to index.php, can you please update the permalink setting and update the .htaccess file with that.

b. If the situation still arises can you please try deactivating the plugins one by one and see if any of the plugin is causing the issue.

Most probably point a. will solve your problem.

Thanks

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