Thanks for the support.
The WordPress site apparently was hacked... I did find 2 FTP files that the kacker was trying to use to increase FTP quota in the root folder, which I deleted. I also replaced all WordPress files, except the "wp-content" folder.
Right now, other pages of the site are loading except the homepage. Each time I tried to access the homepage, I get the error, "this page isn’t working... redirected you too many times. Try clearing your cookies. ERR_TOO_MANY_REDIRECTS."
1- I cleared the browser history several times, setting it to "All Time".
2- I ran WordPress folders and files permission through SSH to make sure it's not a folder and file permission issue.
3- I Ran a database repair through SSH, which was completed successfully.
4- I deactivated all plugins
5- Cleaned up .htaccess file
But, when I tried to use WordPress Repair Tool, I get the error message that I have to add "define('WP_ALLOW_REPAIR', true);" to the "wp-config.php" file, which I already added before trying to run the URL, for example, "https://mydomainname.com/wp-admin/maint/repair.php". At this point, I'm guessing WordPress is not able to read the "wp-config.php" file that's why I'm also getting that error when I try to call the repair line from the "wp-config.php" file.