Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in /home/aouadmin/public_html/spt.aou.edu.ng/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Style/Supervisor.php:9 Stack trace: #0 {main} thrown in /home/aouadmin/public_html/spt.aou.edu.ng/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Style/Supervisor.php on line 9