Hello

After changing the file manually to upgrade the oc-admin dashboard is Empty with the below error Log


blic_html/oc-admin/themes/modern/upgrade/index.php' (include_path='.:/opt/cpanel/ea-php73/root/usr/share/pear') in /home/laptopso/public_html/oc-includes/osclass/helpers/hDefines.php on line 232



[05-Apr-2021 08:25:46 UTC] Cache memcache NOT SUPPORTED - loaded Object_Cache_default cache


Please Help

Thanks

First disable cache, next I recommend to check backoffice theme into omega.
4.3 does not contain modern theme anymoreso to change theme do it in database, t_preference table, admin_theme field change from modern to omega.