Migrate to localhost

Hi everyone I have a old version on my open journal system 2.4.8.3, and I want to move to my local to update to the new one!

I’m looking for any tutorial or something to explain how to migrate, but I don’t find nothing.

I downloaded a copy of all the files from the server and I have a copy of the database, even I change the config.inc.php change to my database and url in localhost. But nothing happens.

This page isn’t working

localhost is currently unable to handle this request.

HTTP ERROR 500

Any idea or any tutorial or something that can help me!!

Thanks in advances!!