Install Failed - Cannot find /usr/local/directadmin/conf/directadmin.conf

I know there's like 200 threads about this, but I can't find any with a viable fix.

I've checked my license to ensure the OS is set properly (CentOS 8) as the link the error showed suggested I do. From what I can tell, not having a resolved hostname won't stop the installation but that may have changed or I may be mistaken. Here's the final bits of my ssh output:

*************************************
* *
* All parts have been installed *
* *
*************************************

Type: systemctl restart httpd.service
## REPORT_START
Welcome to DirectAdmin version 1.59.5!
You are now about to run the install program. If DirectAdmin is already
installed, it may destroy previous data.

*** The hostname provided ('localhost') is not a valid domain ***

check the /usr/local/directadmin/scripts/setup.txt
## INSTALL_FAILED
## REPORT_END
Permissions set
Can't open /usr/local/directadmin/data/admin/services.status: No such file or directory.

System Security Tips:
http://help.directadmin.com/item.php?id=247

*********************************
*
* Cannot find /usr/local/directadmin/conf/directadmin.conf
* Please see this guide:
* http://help.directadmin.com/item.php?id=267
*
*********************************
PHP has been secured.
Restarting php-fpm72.
Job for php-fpm72.service failed because the control process exited with error code.
See "systemctl status php-fpm72.service" and "journalctl -xe" for details.

#############################################################################

After two sleepless nights I'm dead. Any ideas?