Hi,
same problem here! osTicket is 1.11.
Upload is correct, there exists a file "2IR5LcMcP7v71RFqnEpPMX9yDUFAhSFQ" under /srv/www/01-ticket/www/attachements/2
The file has correct rights, as far as I can tell and if I copy this file to my PC, rename it to image.jpg I'm able to open it with standard image viewers.
Furthermore, if I open the attachement throu osTicket, I get the following URL:
https://(mydomain)/file.php?key=2ir5lcmcp7v71rfqneppmx9ydufahsfq&expires=1550880000&signature=(some value) - where the key coincides with the filename above (except for upper- and lower-case letters).
If I use the browser inspector, there is a file stream with correct length, so the image seems to be transferred.
!!! But, no image is displayed !!!