If you are uploading image or any file in Front CMS > Media Manager and its not uploading and nothing happened then please check your hosting phpinfo details for fileinfo extension is enabled/installed on your hosting server. If fileinfo extension missing on your server then contact your hosting provider for enabling/installing fileinfo extension on your server.

Due to missing fileinfo extension Smart School media manager is unable to retrieve uploaded file extension hence images are not being uploaded. Fileinfo is very common extension and present almost all popular hosting.