Changing the wp-config.php broke the site

Question

I added the lines define( 'WP_CONTENT_DIR', $_SERVER['DOCUMENT_ROOT'] . '/blog/wp-content' ); and define( 'WP_CONTENT_URL', 'example/blog/wp-content';); in my wp-config.php and then my site broke. Even some of the widgets on the backend do not appear anymore. I immediately removed the above lines from the wp-config.php however that did not change anything.

PLEASE HELP