Custom Domains Missing after Upgrading to 1.4.0

When upgrading from 1.3.8 to 1.4 I noticed CORs issues on a few of my sites. When looking in the settings under custom domains I no longer have any there. I've tried to add them back but am getting failed verification now.

TL;DR

User is reporting that after upgrading to version 1.4.0, custom domains are missing and unable to be added back. They have also encountered CORs issues on some sites. User requests assistance in resolving the issue. Solution: It is suggested to check the _console_rules table in the mariadb database to see if the custom domains are present. Additionally, checking the browser network logs may provide helpful information. User is also advised to ensure that they ran the migrate command after upgrading and to check for any errors during the migration process. It is recommended to have a backup from before the upgrade as a precaution.