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Fatal error: Uncaught Error: Call to a member function Execute() on null in /var/www/vhosts/egitim360.app/lib.egitim360.app/lib/drop.php:317 Stack trace: #0 /var/www/vhosts/egitim360.app/admin.egitim360.app/frames/upload.php(16): Drop::UploadMonths() #1 /var/www/vhosts/egitim360.app/admin.egitim360.app/index.php(7): require('...') #2 {main} thrown in /var/www/vhosts/egitim360.app/lib.egitim360.app/lib/drop.php on line 317