After upgrading from 1.to the latest version, I can access most of the site eg https://www.mydomain.com/support/scp/settings.php

, but when clicking the Home icon, which links to www.mydomain/support/scp

I get the following error

Fatal error: Uncaught Error: Undefined constant "TABLE_PREFIX" in /home/customer/www/mydomain.com/public_html/support/bootstrap.php:189 Stack trace: #0 /home/customer/www/mydomain.com/public_html/support/main.inc.php(24): Bootstrap::loadConfig() #1 /home/customer/www/mydomain.com/public_html/support/scp/staff.inc.php(20): require_once('/home/customer/...') #2 /home/customer/www/mydomain.com/public_html/support/scp/tickets.php(17): require('/home/customer/...') #3 /home/customer/www/mydomain.com/public_html/support/scp/index.php(17): require('/home/customer/...') #4 {main} thrown in /home/customer/www/mydomain.com/public_html/support/bootstrap.php on line 189

my ost-config.php does have that variable defined, correctly

# Table prefix
define('TABLE_PREFIX','ost_');

#

and I believe that is correct, as in phpMyadmin all tables are prefixed: