Warning: require_once(core.php): Failed to open stream: No such file or directory in /home/fmori/public_html/mantis/adm_config_page.php on line 39

Fatal error: Uncaught Error: Failed opening required 'core.php' (include_path='.:/opt/cpanel/ea-php83/root/usr/share/pear') in /home/fmori/public_html/mantis/adm_config_page.php:39 Stack trace: #0 {main} thrown in /home/fmori/public_html/mantis/adm_config_page.php on line 39