AdenW
Hmmm...that doesn't really make much sense. The expiration date is good and everything. Have you searched for that file on the filesystem (where the key is the filename in the attachment folder) and it exists? Can you try migrating it back to the database to see if it starts working again? To do so go to the database, find that file record, copy the file's id, then go to the server, change directory to the osTicket directory, and migrate the file by using this command (replace /path/to/php with your relevant php command and replace file_id_here with the id you copied from the database):
/path/to/php manage.php file migrate -F file_id_here -b F -m D
To confirm that worked the command should output Migrated 1 file and in the db the file record should show a bk value of D. Then try accessing it in an incognito window and see.
Have y'all also tried from a different network and stuff?
Cheers.
