Just ran the latest update for version 5. Got a bunch of these errors (using PHP 7.4)

Warning: Use of undefined constant ACYM_STARTER - assumed 'ACYM_STARTER' (this will throw an Error in a future version of PHP) in /home/ccanswor/public_html/tmp/install_60b5a787ad3fa/install.class.php on line 138

Warning: Use of undefined constant ACYM_ESSENTIAL - assumed 'ACYM_ESSENTIAL' (this will throw an Error in a future version of PHP) in /home/ccanswor/public_html/tmp/install_60b5a787ad3fa/install.class.php on line 139

Warning: Use of undefined constant ACYM_ENTERPRISE - assumed 'ACYM_ENTERPRISE' (this will throw an Error in a future version of PHP) in /home/ccanswor/public_html/tmp/install_60b5a787ad3fa/install.class.php on line 140

Warning: Use of undefined constant ACYM_ESSENTIAL - assumed 'ACYM_ESSENTIAL' (this will throw an Error in a future version of PHP) in /home/ccanswor/public_html/tmp/install_60b5a787ad3fa/install.class.php on line 169

Warning: Use of undefined constant ACYM_ESSENTIAL - assumed 'ACYM_ESSENTIAL' (this will throw an Error in a future version of PHP) in /home/ccanswor/public_html/administrator/components/com_acym/helpers/update.php on line 82

What are the implications for the use of V5? (v7 is not an option. Cannot get my head around it).

Thanks