Hello,

Please make sure that you have uploaded all the files specially the .htaccess file. Mostly 404 error is due to missing .htaccess file. Please double check and upload it again. dot files are hidden by default on linux/unix system.

Other cause might be mod_rewrite, please make sure it's enabled and configure to use .htaccess from site directory.

Lastly check the base_url in app/config/config.php If you have enabled SSL then the base_url should start with https://

If all check and still can't find the cause, let me know the site and server details in private reply to check.

Thank you