500 internal server error after changing Wordpress URL

Hi there-

I’m getting a 500 internal server error whenever I try to load up my website. I made a mistake earlier when I was using Wordpress. I accidentally put an incorrect URL for my site in the in the admin dashboard, which messed up the site. I hardcoded the variables inside wp-config.php, so I could load the site again. This worked, however, I made the mistake of deleting these variables once the site was working. Since then I am getting a 500 internal server error, and every page on my site is blank. When I put the variables in again, to define the site URL, it didn’t work. I have already checked the .htaccess file and disabled plugins, which did not work. Any ideas?

Thanks.