Fatal error: Uncaught Error: Non-static method install::checkInstall() cannot be called statically in /mnt/www/myframe/framework/get.class.php:833 Stack trace: #0 /mnt/www/myframe/main_loader.php(182): get->__construct() #1 /mnt/www/myframe/plugins/admin_page/form/ajax/staff/delete.php(2): include('/mnt/www/myfram...') #2 {main} thrown in /mnt/www/myframe/framework/get.class.php on line 833