After upgrading Magento 1.9.1 to 18.104.22.168 manually via FTP, the site works fine except when you get to the checkout success page. It is blank.
The exception log shows that the core_email_queue_recipients table is missing.
Checking the database with MySQL Workbench shows that it is indeed missing. I am assuming that the SQL upgrade script did not fire, but I have no idea how to fire this.
Some sources say to go to the core_resources table and modify the database version value there to make it fire, but they don't mention which 'code' field value is the database version. See https://community.magento.com/t5/Version-Upgrades/1-9-0-1-to-1-9-2-2-missing-core-email-queue-table/td-p/22350