Failed to run /usr/bin/yum-config-manager on the repository named Mysql55-community

Symptoms

Attempting to upgrade from MySQL 8.0 to 8.4 results in "Failed to run /usr/bin/yum-config-manager on the repository named Mysql55-community"

Description

When upgrading from MySQL from the MySQL upgrade interface, the upgrade will fail with this error.

We've opened an internal case for our development team to investigate this further. For reference, the case number is CPANEL-46584. Follow this article to receive an email notification when a solution is published in the product. 

Workaround

The mysql80-community-release package needs to be reinstalled:

dnf reinstall mysql80-community-release

Afterwards, you can attempt the upgrade again with:

whmapi1 start_background_mysql_upgrade version=8.4