After making a slight change under GENERAL – SETTINGS, my site crashed.
I removed the “wp” from WordPress Address (URL) and after updating, the site crashed. Not cool. There are a few ways to fix it, but the easiest way if you have FTP access to the site is:
1. FTP to your site and get a copy of the active theme’s functions.php file. Edit it in any vanilla text editor (like notepad) and upload it back to the site.
2. Add these two lines to the file, immediately after the initial “<?php” line.
update_option('siteurl','http://patrioticfederalist.com/wp');
update_option('home','http://patrioticfederalist.com/wp');
Replace with your own URL or course.
3. Upload the file back to your site, in the same location.
4. Load the login or admin page a few times. The site will come back up.
5. Repeat the above steps, but remove those lines. DO NOT leave those lines in there. Remove them immediately after the site is back up.
This and other alternatives are linked here.