Update: I was able to (luckily) fix the problem with the “class-wp-walker.php” file. The problem has now been moved to do a different file. When I load up my website the following message appears:
Fatal error: Class ‘wpdb’ not found in /home/cameronj/public_html/wp-includes/load.php on line 352
I apologize. I wrote “.com” above, but meant to say “.org”. The file was downloaded from “wordpress.org/download”.