cPanel WHM Version 80 will not support MySQL 5.5, and updates to cPanel WHM Version 80 will be blocked for any server still running MySQL 5.5.
Why the block?
On December 31st, 2018, MySQL version 5.5 entered End of Life status. Any server currently running MySQL 5.5 will not receive any updates, bug fixes, or security patches for MySQL until MySQL is updated to a version 5.6 or later.
Upgrading your MySQL version
To update your server you can use WHM’s MySQL/MariaDB Upgrade interface. Log into your WHM and type MySQL in the search box. Select the link for MySQL/MariaDB Upgrade and then select the version of MySQL or MariaDB that you would like to upgrade to, and the software does the rest of the work!
We recommend upgrading one version at a time, to ensure the most stability and ALWAYS make a backup prior to any upgrade.